{"id":54477,"date":"2026-05-29T09:30:00","date_gmt":"2026-05-29T02:30:00","guid":{"rendered":"https:\/\/coffeefactz.com\/?p=54477"},"modified":"2026-09-12T10:51:13","modified_gmt":"2026-09-12T03:51:13","slug":"khoa-hoc-chiet-xuat-ca-phe-chua-va-dang","status":"publish","type":"post","link":"https:\/\/coffeefactz.com\/vi\/khoa-hoc-chiet-xuat-ca-phe-chua-va-dang\/","title":{"rendered":"Khoa h\u1ecdc chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea: C\u00e1ch ch\u1ea9n \u0111o\u00e1n m\u1ebb pha chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi vs qu\u00e1 m\u1ee9c"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Chi\u1ebft xu\u1ea5t kh\u00f4ng chu\u1ea9n x\u00e1c kh\u00f4ng ch\u1ec9 t\u1ea1o ra m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea d\u1edf, n\u00f3 t\u1ea1o ra m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea d\u1edf v\u1edbi c\u00e1c tri\u1ec7u ch\u1ee9ng c\u00f3 th\u1ec3 ch\u1ea9n \u0111o\u00e1n r\u00f5 r\u00e0ng. Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi (under-extraction) khi\u1ebfn t\u00e1ch c\u00e0 ph\u00ea b\u1ecb chua g\u1eaft, c\u00f3 v\u1ecb m\u1eb7n ch\u00e1t v\u00e0 r\u1ed7ng tu\u1ebfch, thi\u1ebfu th\u1ed1n v\u1ecb ng\u1ecdt m\u00e0 m\u1ed9t \u0111\u1ed9 chua c\u00e2n b\u1eb1ng r\u1ea5t c\u1ea7n. Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c (over-extraction) l\u1ea1i \u0111\u1ea9y h\u01b0\u01a1ng v\u1ecb v\u01b0\u1ee3t qua v\u1ecb ng\u1ecdt \u0111\u1ec3 b\u01b0\u1edbc th\u1eb3ng v\u00e0o s\u1ef1 \u0111\u1eafng ngh\u00e9t v\u00e0 ch\u00e1t kh\u00f4 &#8211; nh\u1eefng t\u1ea1p v\u1ecb b\u00e1m dai d\u1eb3ng r\u1ea5t l\u00e2u sau khi b\u1ea1n u\u1ed1ng xong.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, th\u1eddi gian pha v\u00e0 t\u1ef7 l\u1ec7 pha &#8211; m\u1ed7i y\u1ebfu t\u1ed1 \u0111\u1ec1u k\u00e9o chi\u1ebft xu\u1ea5t theo m\u1ed9t h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh. H\u1ecdc c\u00e1ch \u0111\u1ecdc nh\u1eefng g\u00ec hi\u1ec7n di\u1ec7n trong t\u00e1ch, b\u1ea1n s\u1ebd bi\u1ebft ch\u00ednh x\u00e1c m\u00ecnh c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh \u0111\u00f2n b\u1ea9y n\u00e0o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea ki\u1ebfn t\u1ea1o h\u01b0\u01a1ng v\u1ecb nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea tu\u00e2n theo m\u1ed9t chu\u1ed7i ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc nghi\u00eam ng\u1eb7t (axit h\u00f2a tan \u0111\u1ea7u ti\u00ean, sau \u0111\u00f3 \u0111\u1ebfn v\u1ecb ng\u1ecdt, v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 v\u1ecb \u0111\u1eafng) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u00e1ch c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n b\u1edfi th\u1eddi \u0111i\u1ec3m b\u1ea1n d\u1eebng chu\u1ed7i \u0111\u00f3 l\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y li\u00ean t\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c n\u01b0\u1edbng m\u1ed9t m\u1ebb b\u00e1nh quy. R\u00fat khay b\u00e1nh ra qu\u00e1 s\u1edbm, b\u00e1nh s\u1ebd nh\u00e3o v\u00e0 s\u1ed1ng s\u01b0\u1ee3ng. \u0110\u1ec3 trong l\u00f2 qu\u00e1 l\u00e2u, b\u00e1nh s\u1ebd ch\u00e1y kh\u00e9t. Lu\u00f4n c\u00f3 m\u1ed9t khung th\u1eddi gian v\u00e0ng \u1edf gi\u1eefa n\u01a1i m\u1ecdi th\u1ee9 \u0111\u1ea1t \u0111\u1ed9 ho\u00e0n h\u1ea3o tuy\u1ec7t \u0111\u1ed1i. Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea c\u0169ng v\u1eadn h\u00e0nh t\u01b0\u01a1ng t\u1ef1, ch\u1ec9 kh\u00e1c l\u00e0 thay v\u00ec nhi\u1ec7t \u0111\u1ed9 l\u00f2 n\u01b0\u1edbng v\u00e0 th\u1eddi gian n\u01b0\u1edbng, b\u1ea1n d\u00f9ng \u00e1p l\u1ef1c n\u01b0\u1edbc v\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac \u0111\u1ec3 k\u00e9o c\u00e1c h\u1ee3p ch\u1ea5t h\u01b0\u01a1ng v\u1ecb ra kh\u1ecfi b\u1ed9t c\u00e0 ph\u00ea theo m\u1ed9t tr\u1eadt t\u1ef1 c\u00f3 th\u1ec3 \u0111o\u00e1n tr\u01b0\u1edbc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ec1n t\u1ea3ng khoa h\u1ecdc \u0111\u00e3 ch\u1ee9ng minh tr\u1ef1c ti\u1ebfp \u0111i\u1ec1u n\u00e0y. M\u1ed9t nghi\u00ean c\u1ee9u quang ph\u1ed5 kh\u1ed1i th\u1eddi gian th\u1ef1c c\u00f4ng b\u1ed1 tr\u00ean t\u1ea1p ch\u00ed <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1387380616000440\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>International Journal of Mass Spectrometry<\/strong><\/u><\/a> \u0111\u00e3 theo d\u00f5i s\u1ef1 gi\u1ea3i ph\u00f3ng c\u00e1c h\u1ee3p ch\u1ea5t trong qu\u00e1 tr\u00ecnh pha espresso v\u00e0 x\u00e1c nh\u1eadn nh\u1eefng g\u00ec ng\u00e0nh c\u00e0 ph\u00ea \u0111\u1eb7c s\u1ea3n \u0111\u00e3 quan s\u00e1t t\u1eeb l\u00e2u: c\u00e1c axit h\u1eefu c\u01a1 ph\u00e2n c\u1ef1c cao, tr\u1ecdng l\u01b0\u1ee3ng ph\u00e2n t\u1eed th\u1ea5p h\u00f2a tan g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec khi ch\u1ea1m n\u01b0\u1edbc, trong khi c\u00e1c h\u1ee3p ch\u1ea5t phenolic \u0111\u1eafng l\u1edbn h\u01a1n (nh\u01b0 pyrazine) ch\u1ec9 b\u1ed9c l\u1ed9 sau th\u1eddi gian chi\u1ebft xu\u1ea5t k\u00e9o d\u00e0i. Tr\u1eadt t\u1ef1 \u0111\u00f3 kh\u00f4ng h\u1ec1 ng\u1eabu nhi\u00ean. \u0110\u00f3 l\u00e0 h\u00f3a h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/perfectdailygrind.com\/2019\/08\/coffee-extraction-how-it-helps-create-the-perfect-cup\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Hazel Boydell<\/strong><\/u><\/a>, c\u00e2y b\u00fat c\u1ee7a trang <em>Perfect Daily Grind<\/em>, \u0111\u00e3 \u0111\u00fac k\u1ebft s\u00fac t\u00edch:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;C\u00e1c n\u1ed1t h\u01b0\u01a1ng tr\u00e1i c\u00e2y v\u00e0 t\u00ednh axit \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t \u0111\u1ea7u ti\u00ean, ti\u1ebfp theo l\u00e0 v\u1ecb ng\u1ecdt v\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng, v\u00e0 cu\u1ed1i c\u00f9ng m\u1edbi l\u00e0 v\u1ecb \u0111\u1eafng.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Giai \u0111o\u1ea1n \u1edf gi\u1eefa \u0111\u00f3 (v\u1ecb ng\u1ecdt v\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng) ch\u00ednh x\u00e1c l\u00e0 n\u01a1i b\u1ea1n mu\u1ed1n d\u1eebng l\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t v\u00e0 ti\u00eau chu\u1ea9n Golden Cup<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t (Extraction Yield) l\u00e0 con s\u1ed1 bi\u1ec3u th\u1ecb t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t h\u00f2a tan c\u1ee7a c\u00e0 ph\u00ea th\u1ef1c s\u1ef1 \u0111i v\u00e0o trong t\u00e1ch c\u1ee7a b\u1ea1n. H\u1ea1t c\u00e0 ph\u00ea c\u00f3 kho\u1ea3ng 28\u201330% kh\u1ed1i l\u01b0\u1ee3ng h\u00f2a tan \u0111\u01b0\u1ee3c trong n\u01b0\u1edbc, ngh\u0129a l\u00e0 \u0111\u00f3 l\u00e0 m\u1ee9c tr\u1ea7n l\u00fd thuy\u1ebft m\u00e0 n\u01b0\u1edbc c\u00f3 th\u1ec3 k\u00e9o ra. Nh\u01b0ng b\u1ea1n ho\u00e0n to\u00e0n kh\u00f4ng mu\u1ed1n k\u00e9o ra to\u00e0n b\u1ed9 l\u01b0\u1ee3ng ch\u1ea5t \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u00eau chu\u1ea9n <a href=\"https:\/\/sca.coffee\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Golden Cup<\/strong><\/u><\/a> c\u1ee7a Hi\u1ec7p h\u1ed9i C\u00e0 ph\u00ea \u0110\u1eb7c s\u1ea3n (SCA) \u0111\u1eb7t t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t l\u00fd t\u01b0\u1edfng \u1edf m\u1ee9c <strong>18\u201322%<\/strong>. \u0110\u00f3 l\u00e0 kho\u1ea3ng gi\u1edbi h\u1ea1n n\u01a1i b\u1ea1n \u0111\u00e3 h\u00f2a tan \u0111\u1ee7 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng v\u00e0 d\u1ea7u caramel h\u00f3a \u0111\u1ec3 t\u1ea1o n\u00ean th\u1ec3 ch\u1ea5t v\u00e0 v\u1ecb ng\u1ecdt \u0111\u1ea7m \u0111\u00e0, trong khi d\u1eebng l\u1ea1i ngay tr\u01b0\u1edbc khi c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng ch\u00e1t n\u1eb7ng n\u1ec1 n\u1eb1m s\u00e2u trong h\u1ea1t b\u1eaft \u0111\u1ea7u tho\u00e1t ra. T\u1ef7 l\u1ec7 pha (tr\u1ecdng l\u01b0\u1ee3ng c\u00e0 ph\u00ea so v\u1edbi n\u01b0\u1edbc) \u0111\u1ecbnh h\u00ecnh tr\u1ef1c ti\u1ebfp \u0111i\u1ec3m r\u01a1i c\u1ee7a chi\u1ebft xu\u1ea5t, \u0111\u00f3 l\u00e0 l\u00fd do m\u1ed9t s\u1ef1 thay \u0111\u1ed5i nh\u1ecf v\u1ec1 \u0111\u1ecbnh l\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m d\u1ecbch chuy\u1ec3n to\u00e0n b\u1ed9 h\u1ed3 s\u01a1 h\u01b0\u01a1ng v\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi 18%, v\u1ecb chua s\u1ebd th\u1ed1ng tr\u1ecb v\u00ec \u0111\u01b0\u1eddng ch\u01b0a k\u1ecbp h\u00f2a tan ho\u00e0n to\u00e0n. Tr\u00ean 22%, v\u1ecb \u0111\u1eafng s\u1ebd chi\u1ebfm l\u0129nh v\u00ec b\u1ea1n \u0111\u00e3 \u0111i qua v\u00f9ng ng\u1ecdt \u0111\u1ec3 ti\u1ebfn v\u00e0o v\u00f9ng ph\u00e2n t\u1eed th\u00f4 r\u00e1p h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hai tr\u1ea1ng th\u00e1i chi\u1ebft xu\u1ea5t th\u1ea5t b\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 hai tr\u1ea1ng th\u00e1i th\u1ea5t b\u1ea1i \u0111\u1ec1u mang nh\u1eefng d\u1ea5u \u1ea5n h\u01b0\u01a1ng v\u1ecb t\u1ee9c th\u00ec, r\u00f5 r\u1ec7t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi (Under-extraction)<\/strong> ngh\u0129a l\u00e0 b\u1ea1n \u0111\u00e3 ng\u1eaft qu\u00e1 tr\u00ecnh tr\u01b0\u1edbc khi l\u01b0\u1ee3ng \u0111\u01b0\u1eddng k\u1ecbp h\u00f2a tan. Nh\u1eefng g\u00ec c\u00f2n l\u1ea1i trong t\u00e1ch b\u1ecb \u00e1p \u0111\u1ea3o b\u1edfi c\u00e1c axit tho\u00e1t ra \u0111\u1ea7u ti\u00ean: chua s\u1eafc nh\u1ecdn, g\u1eaft c\u1ed5 v\u00e0 th\u1ec3 ch\u1ea5t lo\u00e3ng to\u1eb9t, kh\u00f4ng c\u00f3 v\u1ecb ng\u1ecdt n\u00e0o b\u00f9 \u0111\u1eafp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c (Over-extraction)<\/strong> ngh\u0129a l\u00e0 b\u1ea1n \u0111\u00e3 ti\u1ebfp t\u1ee5c pha v\u01b0\u1ee3t qua giai \u0111o\u1ea1n v\u1ecb ng\u1ecdt v\u00e0 k\u00e9o theo c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng ch\u00e1t \u1edf ph\u1ea7n \u0111u\u00f4i c\u1ee7a chu\u1ed7i h\u00f2a tan. T\u00e1ch c\u00e0 ph\u00ea c\u00f3 v\u1ecb g\u1eaft, r\u1ed7ng ru\u1ed9t v\u00e0 \u0111\u1ec3 l\u1ea1i c\u1ea3m gi\u00e1c kh\u00f4 r\u00e1p b\u00e1m ch\u1eb7t \u1edf cu\u1ed1ng l\u01b0\u1ee1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc m\u1ed9t c\u00e2u c\u1ea7n kh\u1eafc c\u1ed1t ghi t\u00e2m: <strong>v\u1ecb chua g\u1eaft v\u00e0 lo\u00e3ng \u0111\u1ed3ng ngh\u0129a b\u1ea1n \u0111\u00e3 d\u1eebng qu\u00e1 s\u1edbm; v\u1ecb \u0111\u1eafng ngh\u00e9t v\u00e0 kh\u00f4 r\u00e1p \u0111\u1ed3ng ngh\u0129a b\u1ea1n \u0111\u00e3 \u0111i qu\u00e1 xa.<\/strong> S\u1ef1 ph\u00e2n \u0111\u1ecbnh duy nh\u1ea5t \u0111\u00f3 l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n g\u1ea7n nh\u01b0 m\u1ecdi v\u1ea5n \u0111\u1ec1 pha ch\u1ebf m\u00e0 b\u1ea1n g\u1eb7p ph\u1ea3i.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-guide-under-over-extracted-683x1024.webp\" alt=\"Coffee extraction infographic comparing under-extracted versus over-extracted coffee flavors, showing causes like grind size, water temperature, contact time, and brew ratios.\" class=\"wp-image-49508\" title=\"\" srcset=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-guide-under-over-extracted-683x1024.webp 683w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-guide-under-over-extracted-200x300.webp 200w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-guide-under-over-extracted-768x1152.webp 768w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-guide-under-over-extracted.webp 1024w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi: Chua g\u1eaft, lo\u00e3ng to\u1eb9t v\u00e0 l\u1ec7ch chu\u1ea9n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi c\u1eaft ng\u1eafn qu\u00e1 tr\u00ecnh tr\u01b0\u1edbc khi nh\u1eefng g\u00ec tinh t\u00fay nh\u1ea5t k\u1ecbp h\u00f2a tan v\u00e0o t\u00e1ch: l\u01b0\u1ee3ng \u0111\u01b0\u1eddng v\u00e0 d\u1ea7u t\u1ea1o s\u1ef1 c\u00e2n b\u1eb1ng v\u1eabn n\u1eb1m nguy\u00ean trong b\u00e3 c\u00e0 ph\u00ea trong khi ch\u1ec9 c\u00f3 c\u00e1c axit h\u00f2a tan nhanh k\u1ecbp \u0111i qua. H\u00e3y ngh\u0129 v\u1ec1 b\u1ed9t c\u00e0 ph\u00ea nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng nhi\u1ec1u t\u1ea7ng: axit h\u00f2a tan \u0111\u1ea7u ti\u00ean, g\u1ea7n nh\u01b0 l\u1eadp t\u1ee9c, ti\u1ebfp theo l\u00e0 \u0111\u01b0\u1eddng, r\u1ed3i m\u1edbi \u0111\u1ebfn d\u1ea7u n\u1eb7ng v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng. D\u1eebng qu\u00e1 s\u1edbm, b\u1ea1n m\u1edbi ch\u1ec9 gom \u0111\u01b0\u1ee3c \u0111\u1ee3t s\u00f3ng \u0111\u1ea7u ti\u00ean m\u00e0 kh\u00f4ng ch\u1ecbu \u0111\u1ee3i ph\u1ea7n c\u00f2n l\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng h\u00f3a h\u1ecdc \u0111\u00f3 ch\u1ea1m v\u00e0o l\u01b0\u1ee1i c\u1ee7a b\u1ea1n theo m\u1ed9t c\u00e1ch r\u1ea5t \u0111\u1eb7c th\u00f9. B\u1ea1n s\u1ebd n\u1ebfm th\u1ea5y v\u1ecb chua s\u1eafc nh\u1ecdn, g\u1eaft bu\u1ed1t (nh\u01b0 t\u00e1o xanh, v\u1ecf chanh, \u0111\u00f4i khi h\u01a1i g\u1eaft nh\u01b0 gi\u1ea5m) m\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 ch\u00fat v\u1ecb ng\u1ecdt n\u00e0o ph\u00eda sau \u0111\u1ec3 xoa d\u1ecbu. Th\u1ec3 ch\u1ea5t cho c\u1ea3m gi\u00e1c lo\u00e3ng to\u1eb9t nh\u01b0 n\u01b0\u1edbc l\u00e3 \u0111\u1ed9i l\u1ed1t c\u00e0 ph\u00ea. C\u00f2n h\u1eadu v\u1ecb? N\u00f3 bi\u1ebfn m\u1ea5t trong ch\u1edbp m\u1eaft. Kh\u00f4ng c\u00f3 s\u1ef1 \u1ea5m \u00e1p l\u1eafng \u0111\u1ecdng, kh\u00f4ng c\u00f3 d\u01b0 v\u1ecb \u0111\u00e1ng nh\u1edb n\u00e0o. M\u1ed9t s\u1ed1 ng\u01b0\u1eddi c\u00f2n nh\u1eadn th\u1ea5y v\u1ecb h\u01a1i m\u1eb7n l\u1ee3, d\u1ea5u hi\u1ec7u c\u1ee7a c\u00e1c mu\u1ed1i kho\u00e1ng h\u00f2a tan s\u1edbm \u0111\u00e3 \u0111i v\u00e0o t\u00e1ch m\u00e0 thi\u1ebfu \u0111i \u0111\u01b0\u1eddng v\u00e0 d\u1ea7u \u0111\u1ec3 trung h\u00f2a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ed1n nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 g\u00e2y chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed1n bi\u1ebfn s\u1ed1 trong quy tr\u00ecnh pha c\u00f3 th\u1ec3 \u0111\u1ed9c l\u1eadp g\u00e2y ra r\u1eafc r\u1ed1i n\u00e0y, v\u00e0 t\u1ea5t c\u1ea3 ch\u00fang \u0111\u1ec1u v\u1eadn h\u00e0nh qua c\u00f9ng m\u1ed9t c\u01a1 ch\u1ebf: l\u00e0m gi\u1ea3m di\u1ec7n t\u00edch ti\u1ebfp x\u00fac ho\u1eb7c th\u1eddi gian n\u01b0\u1edbc ti\u1ebfp x\u00fac v\u1edbi b\u1ed9t c\u00e0 ph\u00ea.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C\u1ee1 xay qu\u00e1 th\u00f4:<\/strong> H\u1ea1t b\u1ed9t l\u1edbn h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ph\u01a1i ra tr\u01b0\u1edbc n\u01b0\u1edbc \u00edt h\u01a1n. Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t \u00edt h\u01a1n l\u00e0m qu\u00e1 tr\u00ecnh h\u00f2a tan ch\u1eadm v\u00e0 n\u00f4ng h\u01a1n (n\u01b0\u1edbc ch\u1ec9 k\u00e9o axit \u1edf l\u1edbp ngo\u00e0i r\u1ed3i tr\u00f4i tu\u1ed9t \u0111i tr\u01b0\u1edbc khi ch\u1ea1m t\u1edbi l\u01b0\u1ee3ng \u0111\u01b0\u1eddng s\u00e2u b\u00ean trong).<\/li>\n\n\n\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc qu\u00e1 ngu\u1ed9i:<\/strong> H\u00f2a tan l\u00e0 m\u1ed9t ph\u1ea3n \u1ee9ng nhi\u1ec7t h\u1ecdc. H\u1ea1 nhi\u1ec7t \u0111\u1ed9 xu\u1ed1ng d\u01b0\u1edbi kho\u1ea3ng 90\u00b0C, t\u1ed1c \u0111\u1ed9 c\u00e1c h\u1ee3p ch\u1ea5t r\u1eddi kh\u1ecfi b\u00e3 c\u00e0 ph\u00ea s\u1ebd ch\u1eadm l\u1ea1i r\u00f5 r\u1ec7t. Axit v\u1eabn tho\u00e1t ra \u0111\u01b0\u1ee3c (ch\u00fang r\u1ea5t h\u00e1o h\u1ee9c) nh\u01b0ng \u0111\u01b0\u1eddng v\u00e0 d\u1ea7u c\u1ea7n nhi\u1ec7t l\u01b0\u1ee3ng cao h\u01a1n \u0111\u1ec3 gi\u1ea3i ph\u00f3ng.<\/li>\n\n\n\n<li><strong>Th\u1eddi gian pha qu\u00e1 ng\u1eafn:<\/strong> Ngay c\u1ea3 khi c\u1ee1 xay v\u00e0 nhi\u1ec7t \u0111\u1ed9 chu\u1ea9n x\u00e1c, th\u1eddi gian ti\u1ebfp x\u00fac v\u1eabn l\u00e0 chi\u1ebfc \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfm ng\u01b0\u1ee3c c\u1ee7a to\u00e0n b\u1ed9 ph\u1ea3n \u1ee9ng. C\u1eaft ng\u1eafn th\u1eddi gian, b\u1ea1n \u0111ang ng\u1eaft shot tr\u01b0\u1edbc khi \u0111\u01b0\u1eddng k\u1ecbp h\u00f2a tan.<\/li>\n\n\n\n<li><strong>T\u1ef7 l\u1ec7 pha qu\u00e1 th\u1ea5p:<\/strong> M\u1ed9t t\u1ef7 l\u1ec7 nh\u01b0 1:10 (m\u1ed9t gam c\u00e0 ph\u00ea v\u1edbi m\u01b0\u1eddi gam n\u01b0\u1edbc) \u0111\u1ec3 l\u1ea1i qu\u00e1 \u00edt dung m\u00f4i n\u01b0\u1edbc \u0111\u1ec3 chuy\u00ean ch\u1edf to\u00e0n b\u1ed9 c\u00e1c ch\u1ea5t h\u00f2a tan ra kh\u1ecfi b\u00e3. N\u01b0\u1edbc nhanh ch\u00f3ng \u0111\u1ea1t tr\u1ea1ng th\u00e1i b\u00e3o h\u00f2a s\u1edbm, v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u00f2n l\u1ea1i (\u0111\u01b0\u1eddng, th\u1ec3 ch\u1ea5t) bu\u1ed9c ph\u1ea3i n\u1eb1m l\u1ea1i ph\u00eda sau.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch kh\u1eafc ph\u1ee5c chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3i ph\u00e1p r\u1ea5t tr\u1ef1c di\u1ec7n m\u1ed9t khi b\u1ea1n bi\u1ebft c\u1ea7n k\u00e9o \u0111\u00f2n b\u1ea9y n\u00e0o, nh\u01b0ng quy t\u1eafc v\u00e0ng l\u00e0: <strong>ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m.<\/strong> N\u1ebfu b\u1ea1n c\u00f9ng l\u00fac ch\u1ec9nh c\u1ee1 xay, th\u1eddi gian pha v\u00e0 nhi\u1ec7t \u0111\u1ed9, b\u1ea1n s\u1ebd ho\u00e0n to\u00e0n m\u1ea5t kh\u1ea3 n\u0103ng nh\u1eadn bi\u1ebft thay \u0111\u1ed5i n\u00e0o th\u1ef1c s\u1ef1 mang l\u1ea1i hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi c\u1ee1 xay. Ch\u1ec9nh m\u1ecbn h\u01a1n s\u1ebd l\u1eadp t\u1ee9c l\u00e0m t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t v\u00e0 th\u01b0\u1eddng l\u00e0 con \u0111\u01b0\u1eddng nhanh nh\u1ea5t mang l\u1ea1i s\u1ef1 c\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t. N\u1ebfu v\u1eabn ch\u01b0a \u0111\u1ee7, h\u00e3y t\u0103ng nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc l\u00ean t\u1eebng ch\u00fat m\u1ed9t, lu\u00f4n n\u1eb1m trong d\u1ea3i l\u00fd t\u01b0\u1edfng c\u1ee7a m\u1ee9c rang (rang s\u00e1ng th\u01b0\u1eddng h\u01b0\u1edfng l\u1ee3i t\u1eeb nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n, rang \u0111\u1eadm c\u1ea7n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat). Sau \u0111\u00f3 k\u00e9o d\u00e0i th\u1eddi gian pha, v\u00e0 cu\u1ed1i c\u00f9ng, t\u0103ng nh\u1eb9 l\u01b0\u1ee3ng n\u01b0\u1edbc pha \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t chi\u1ebft xu\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang pha espresso, c\u00f3 m\u1ed9t d\u1ea5u hi\u1ec7u th\u1ecb gi\u00e1c nhanh ch\u00f3ng: h\u00e3y quan s\u00e1t d\u00f2ng ch\u1ea3y. M\u1ed9t shot chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi s\u1ebd chuy\u1ec3n m\u00e0u v\u00e0ng nh\u1ea1t (blonde) r\u1ea5t s\u1edbm (m\u00e0u s\u1eafc chuy\u1ec3n t\u1eeb n\u00e2u h\u1ed5 ph\u00e1ch sang v\u00e0ng nh\u1ea1t qu\u00e1 nhanh) v\u00e0 d\u00f2ng ch\u1ea3y tu\u00f4n ra nhanh v\u00e0 lo\u00e3ng. \u0110\u00f3 l\u00e0 d\u00f2ng n\u01b0\u1edbc lao qua m\u00e0 kh\u00f4ng k\u1ecbp l\u00e0m vi\u1ec7c. H\u00e3y ch\u1ec9nh m\u1ecbn h\u01a1n cho \u0111\u1ebfn khi d\u00f2ng ch\u1ea3y ch\u1eadm l\u1ea1i v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c m\u00e0u s\u1eafc \u0111\u1eadm \u0111\u00e0 l\u00e2u h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo c\u00e1c kh\u1ea3o s\u00e1t c\u1ed9ng \u0111\u1ed3ng tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n c\u00e0 ph\u00ea \u0111\u1eb7c s\u1ea3n, <a href=\"https:\/\/www.ratiocoffee.com\/blogs\/coffee-guides\/how-to-stop-guessing-your-way-through-home-coffee-brewing\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>kho\u1ea3ng 60\u201370% ng\u01b0\u1eddi pha t\u1ea1i nh\u00e0 \u1edf m\u1ee9c m\u1edbi b\u1eaft \u0111\u1ea7u v\u00e0 trung c\u1ea5p<\/strong><\/u><\/a> th\u01b0\u1eddng xuy\u00ean g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi, mi\u00eau t\u1ea3 t\u00e1ch c\u00e0 ph\u00ea c\u1ee7a h\u1ecd l\u00e0 chua g\u1eaft, lo\u00e3ng to\u1eb9t ho\u1eb7c thi\u1ebfu v\u1ecb ng\u1ecdt. Con s\u1ed1 \u0111\u00f3 ho\u00e0n to\u00e0n d\u1ec5 hi\u1ec3u: h\u1ea7u h\u1ebft c\u00e1c bi\u1ebfn s\u1ed1 g\u00e2y chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi \u0111\u1ec1u v\u00f4 h\u00ecnh cho \u0111\u1ebfn khi b\u1ea1n h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1ch nh\u1eadn bi\u1ebft ch\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/perfectdailygrind.com\/2021\/03\/a-guide-to-calibrating-your-espresso-recipes\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Shaun Aupiais<\/strong><\/u><\/a>, vi\u1ebft tr\u00ean t\u1edd <em>Perfect Daily Grind<\/em>, \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh ng\u1eafn g\u1ecdn:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;C\u1ee1 xay qu\u00e1 th\u00f4, c\u00e0 ph\u00ea s\u1ebd c\u00f3 v\u1ecb chua g\u1eaft, nhi\u1ec1u n\u01b0\u1edbc v\u00e0 nh\u1ea1t nh\u00f2a, v\u00ec n\u00f3 b\u1ecb chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee1 xay l\u00e0 \u0111\u00f2n b\u1ea9y tr\u1ef1c ti\u1ebfp nh\u1ea5t m\u00e0 b\u1ea1n s\u1edf h\u1eefu \u0111\u1ed1i v\u1edbi t\u1ed1c \u0111\u1ed9 chi\u1ebft xu\u1ea5t, v\u00e0 \u0111\u00f3 lu\u00f4n l\u00e0 n\u01a1i \u0111\u1ea7u ti\u00ean b\u1ea1n c\u1ea7n nh\u00ecn v\u00e0o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Khi v\u1ecb chua v\u00e0 v\u1ecb \u0111\u1eafng c\u00f9ng xu\u1ea5t hi\u1ec7n \u0111\u1ed3ng th\u1eddi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 n\u01a1i c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n th\u00f4ng th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1ed1i r\u1ed1i: \u0111\u00f4i khi t\u00e1ch c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n v\u1eeba c\u00f3 v\u1ecb chua g\u1eaft <em>l\u1ea1i v\u1eeba<\/em> mang c\u1ea3m gi\u00e1c kh\u00f4 r\u00e1t, \u0111\u1eafng ch\u00e1t c\u00f9ng m\u1ed9t l\u00fac. \u0110i\u1ec1u \u0111\u00f3 nghe c\u00f3 v\u1ebb m\u00e2u thu\u1eabn (chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi v\u00e0 chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c trong c\u00f9ng m\u1ed9t t\u00e1ch), nh\u01b0ng th\u1ef1c t\u1ebf \u0111\u00f3 l\u00e0 v\u1ea5n \u0111\u1ec1 c\u1ee7a m\u00e1y xay, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ee7a c\u00f4ng th\u1ee9c pha.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t chi\u1ebfc m\u00e1y xay l\u01b0\u1ee1i dao (blade grinder), hay b\u1ea5t k\u1ef3 m\u00e1y xay n\u00e0o thi\u1ebfu t\u00ednh \u1ed5n \u0111\u1ecbnh, kh\u00f4ng th\u1ec3 t\u1ea1o ra c\u00e1c h\u1ea1t b\u1ed9t \u0111\u1ed3ng \u0111\u1ec1u. N\u00f3 t\u1ea1o ra m\u1ed9t h\u1ed7n h\u1ee3p g\u1ed3m nh\u1eefng m\u1ea9u v\u1ee5n l\u1edbn (&#8220;boulder&#8221;) v\u00e0 b\u1ee5i m\u1ecbn li ti (&#8220;fines&#8221;). Nh\u1eefng m\u1ea9u l\u1edbn b\u1ecb chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi, t\u1ea1o ra v\u1ecb chua g\u1eaft bu\u1ed1t. B\u1ee5i m\u1ecbn b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c g\u1ea7n nh\u01b0 ngay t\u1ee9c th\u00ec, t\u1ea1o ra v\u1ecb \u0111\u1eafng ngh\u00e9t v\u00e0 ch\u00e1t kh\u00f4. T\u00e1ch c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n k\u1ebft th\u00fac v\u1edbi c\u1ea3 hai l\u1ed7i h\u01b0\u01a1ng v\u1ecb x\u1ebfp ch\u1ed3ng l\u00ean nhau, v\u00e0 kh\u00f4ng c\u00f3 c\u00e1ch ch\u1ec9nh th\u1eddi gian hay nhi\u1ec7t \u0111\u1ed9 n\u00e0o c\u00f3 th\u1ec3 th\u00e1o g\u1ee1 \u0111\u01b0\u1ee3c, b\u1edfi v\u00ec b\u1ea3n th\u00e2n s\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u00e3 l\u00e0 m\u1ed9t s\u1ef1 h\u1ed7n lo\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n th\u01b0\u1eddng xuy\u00ean ph\u00e1t ra c\u00e1c t\u00edn hi\u1ec7u h\u1ed7n h\u1ee3p (v\u1eeba chua <em>v\u1eeba<\/em> kh\u00f4 ch\u00e1t, v\u1eeba s\u1eafc nh\u1ecdn <em>v\u1eeba<\/em> th\u00f4 r\u00e1p), h\u00e3y n\u00e2ng c\u1ea5p l\u00ean m\u1ed9t chi\u1ebfc <strong>m\u00e1y xay \u0111\u0129a g\u1edd (burr grinder)<\/strong> tr\u01b0\u1edbc khi thay \u0111\u1ed5i b\u1ea5t k\u1ef3 \u0111i\u1ec1u g\u00ec kh\u00e1c. N\u1ebfu kh\u00f4ng c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u1ed3ng nh\u1ea5t, kh\u00f4ng m\u1ed9t bi\u1ebfn s\u1ed1 n\u00e0o kh\u00e1c c\u00f3 th\u1ec3 v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh. B\u1ea1n \u0111ang c\u1ed1 g\u1eafng ch\u01a1i m\u1ed9t b\u1ea3n nh\u1ea1c tr\u00ean m\u1ed9t c\u00e2y \u0111\u00e0n b\u1ecb l\u1ec7ch ph\u00edm ngay t\u1eeb kh\u00e2u s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c: \u0110\u1eafng ngh\u00e9t, ch\u00e1t kh\u00f4 v\u00e0 r\u1ed7ng ru\u1ed9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c x\u1ea3y ra khi qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t ch\u1ea1y v\u01b0\u1ee3t qua \u0111i\u1ec3m ng\u1ecdt ng\u00e0o (v\u01b0\u1ee3t qua l\u01b0\u1ee3ng \u0111\u01b0\u1eddng) v\u00e0 b\u1eaft \u0111\u1ea7u l\u00f4i k\u00e9o c\u00e1c ch\u1ea5t ch\u00e1t tannin \u0111\u1eafng c\u00f9ng c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 th\u00f4 r\u00e1p ra kh\u1ecfi h\u1ea1t c\u00e0 ph\u00ea. N\u01b0\u1edbc kh\u00f4ng h\u1ec1 d\u1eebng l\u1ea1i khi nh\u1eefng g\u00ec tinh t\u00fay \u0111\u00e3 c\u1ea1n ki\u1ec7t. N\u00f3 ti\u1ebfp t\u1ee5c h\u00f2a tan, l\u00f4i ra m\u1ecdi th\u1ee9 v\u1ed1n l\u1ebd ra ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ec3 l\u1ea1i trong b\u00e3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u01a1ng v\u1ecb s\u1ebd m\u00e1ch b\u1ea3o b\u1ea1n ngay l\u1eadp t\u1ee9c. C\u00f3 m\u1ed9t v\u1ecb \u0111\u1eafng g\u1eaft, s\u1eafc nh\u1ecdn nh\u01b0 m\u00f9i thu\u1ed1c t\u00e2y b\u00e1m ch\u1eb7t l\u1ea5y cu\u1ed1ng h\u1ecdng. Ti\u1ebfp theo l\u00e0 c\u1ea3m gi\u00e1c v\u00f2m mi\u1ec7ng kh\u00f4 r\u00e1p, r\u00edt r\u00e1t nh\u01b0 ph\u1ea5n &#8211; ch\u00ednh l\u00e0 c\u1ea3m gi\u00e1c ch\u00e1t se mi\u1ec7ng b\u1ea1n g\u1eb7p ph\u1ea3i khi ng\u00e2m tr\u00e0 \u0111en qu\u00e1 l\u00e2u, n\u01a1i khoang mi\u1ec7ng b\u1ea1n c\u1ea3m gi\u00e1c nh\u01b0 b\u1ecb v\u1eaft ki\u1ec7t \u0111\u1ed9 \u1ea9m. V\u00e0 \u1ea9n b\u00ean d\u01b0\u1edbi t\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u \u0111\u00f3 l\u00e0 s\u1ef1 r\u1ed7ng tu\u1ebfch. V\u1ecb ng\u1ecdt v\u00e0 \u0111\u1ed9 s\u00e1ng thanh l\u1ebd ra ph\u1ea3i neo gi\u1eef t\u00e1ch c\u00e0 ph\u00ea th\u00ec nay ho\u00e0n to\u00e0n bi\u1ebfn m\u1ea5t. Nh\u1eefng g\u00ec c\u00f2n l\u1ea1i ch\u1ec9 l\u00e0 v\u1ecb kh\u00e9t l\u1eb9t, m\u00f9i tro t\u00e0n v\u00e0 s\u1ef1 nh\u1ea1t nh\u00f2a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ed1n bi\u1ebfn s\u1ed1 \u0111\u1ea9y chi\u1ebft xu\u1ea5t \u0111i qu\u00e1 xa<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee1 xay th\u01b0\u1eddng l\u00e0 n\u01a1i \u0111\u1ea7u ti\u00ean c\u1ea7n ki\u1ec3m tra. Khi c\u1ee1 xay qu\u00e1 m\u1ecbn, b\u1ea1n t\u1ea1o ra di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t kh\u1ed5ng l\u1ed3, v\u00e0 l\u01b0\u1ee3ng b\u1ee5i si\u00eau m\u1ecbn (microfines) &#8211; nh\u1eefng h\u1ea1t li ti l\u1ecdt qua m\u00e0ng l\u1ecdc v\u00e0 ti\u1ebfp t\u1ee5c chi\u1ebft xu\u1ea5t r\u1ea5t l\u00e2u sau khi m\u1ebb pha \u0111\u00e3 &#8220;ho\u00e0n t\u1ea5t&#8221; &#8211; s\u1ebd \u0111\u1ea9y nhanh to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh. Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc l\u00e0m tr\u1ea7m tr\u1ecdng th\u00eam v\u1ea5n \u0111\u1ec1. N\u01b0\u1edbc n\u00f3ng h\u01a1n l\u00e0 m\u1ed9t dung m\u00f4i hung h\u00e3n h\u01a1n, v\u00e0 \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean kho\u1ea3ng 96\u00b0C, n\u00f3 b\u1eaft \u0111\u1ea7u h\u00f2a tan c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng nhanh h\u01a1n m\u1ee9c b\u1ea1n mong mu\u1ed1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1eddi gian pha l\u00e0 \u0111\u00f2n b\u1ea9y th\u1ee9 ba. D\u00f2ng ch\u1ea3y nh\u1ecf gi\u1ecdt qu\u00e1 ch\u1eadm, vi\u1ec7c r\u00f3t th\u00eam n\u01b0\u1edbc, ho\u1eb7c ng\u00e2m b\u00e3 c\u00e0 ph\u00ea trong n\u01b0\u1edbc qu\u00e1 l\u00e2u \u0111\u1ec1u \u0111\u1ea9y \u0111\u01b0\u1eddng cong chi\u1ebft xu\u1ea5t v\u01b0\u1ee3t qua v\u00f9ng \u0111\u01b0\u1eddng ng\u1ecdt \u0111\u1ec3 ti\u1ebfn v\u00e0o v\u00f9ng \u0111\u1eafng ch\u00e1t. T\u00e1c nh\u00e2n th\u1ee9 t\u01b0 \u00edt r\u00f5 r\u00e0ng h\u01a1n: t\u1ef7 l\u1ec7 pha. M\u1ed9t t\u1ef7 l\u1ec7 nh\u01b0 1:20 (qu\u00e1 nhi\u1ec1u n\u01b0\u1edbc so v\u1edbi l\u01b0\u1ee3ng c\u00e0 ph\u00ea) \u0111\u01b0a m\u1ed9t th\u1ec3 t\u00edch n\u01b0\u1edbc l\u1edbn ch\u1ea3y qua c\u00f9ng m\u1ed9t l\u01b0\u1ee3ng b\u1ed9t, b\u00f2n r\u00fat \u0111\u1ebfn ph\u00e2n t\u1eed h\u00f2a tan cu\u1ed1i c\u00f9ng m\u00e0 b\u00e3 c\u00e0 ph\u00ea gi\u1eef l\u1ea1i. K\u1ebft qu\u1ea3 kh\u00f4ng ph\u1ea3i m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea l\u1edbn h\u01a1n v\u1edbi c\u00f9ng h\u01b0\u01a1ng v\u1ecb, m\u00e0 l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n lo\u00e3ng h\u01a1n, \u0111\u1eafng \u0111\u00f3t h\u01a1n c\u1ee7a nh\u1eefng g\u00ec n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch kh\u1eafc ph\u1ee5c tu\u00e2n theo c\u00f9ng logic v\u1edbi vi\u1ec7c ch\u1ea9n \u0111o\u00e1n. Xay th\u00f4 h\u01a1n \u0111\u1ec3 gi\u1ea3m b\u1edbt di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t. H\u1ea1 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc xu\u1ed1ng v\u00e0i \u0111\u1ed9. R\u00fat ng\u1eafn th\u1eddi gian ti\u1ebfp x\u00fac ho\u1eb7c gi\u1ea3m b\u1edbt s\u1ef1 khu\u1ea5y \u0111\u1ea3o. Thu h\u1eb9p t\u1ef7 l\u1ec7 pha \u0111\u1ec3 b\u1ea1n kh\u00f4ng \u00e9p b\u00e3 c\u00e0 ph\u00ea ph\u1ea3i cho \u0111i nhi\u1ec1u n\u01b0\u1edbc h\u01a1n m\u1ee9c n\u00f3 c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng m\u1ed9t c\u00e1ch \u00eam \u00e1i. V\u00e0 quy t\u1eafc t\u1eebng \u00e1p d\u1ee5ng cho chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi c\u0169ng \u00e1p d\u1ee5ng t\u1ea1i \u0111\u00e2y: <strong>ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi espresso, t\u00edn hi\u1ec7u th\u1ecb gi\u00e1c r\u1ea5t r\u00f5 r\u00e0ng: d\u00f2ng ch\u1ea3y nh\u1ecf gi\u1ecdt ch\u1eadm ch\u1ea1p, m\u00e0u n\u01b0\u1edbc r\u1ea5t t\u1ed1i (g\u1ea7n nh\u01b0 \u0111en k\u1ecbt) v\u00e0 m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c tr\u1ecdng l\u01b0\u1ee3ng m\u1ee5c ti\u00eau. D\u00f2ng ch\u1ea3y ngh\u1ebdn l\u1ea1i \u0111\u00f3 ch\u00ednh l\u00e0 chi\u1ebfc m\u00e1y \u0111ang b\u00e1o hi\u1ec7u r\u1eb1ng c\u1ee1 xay qu\u00e1 m\u1ecbn v\u00e0 l\u1ef1c c\u1ea3n b\u00e1nh c\u00e0 ph\u00ea \u0111ang qu\u00e1 l\u1edbn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Khi hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh gi\u1ea3 d\u1ea1ng chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi b\u1ea1n v\u1ed9i v\u00e0ng ch\u1ec9nh c\u1ee1 xay th\u00f4 h\u01a1n, c\u00f3 m\u1ed9t th\u1ee7 ph\u1ea1m tinh vi h\u01a1n c\u1ea7n ph\u1ea3i lo\u1ea1i tr\u1eeb: hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh (channeling). \u0110\u00e2y l\u00e0 n\u01a1i vi\u1ec7c ch\u1ea9n \u0111o\u00e1n chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c tr\u1edf n\u00ean th\u1ef1c s\u1ef1 h\u00f3c b\u00faa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh x\u1ea3y ra khi n\u01b0\u1edbc t\u00ecm th\u1ea5y c\u00e1c con \u0111\u01b0\u1eddng h\u1eb9p, ch\u1ea3y nhanh xuy\u00ean qua b\u00e1nh c\u00e0 ph\u00ea thay v\u00ec th\u1ea5m \u0111\u1ec1u qua to\u00e0n b\u1ed9 kh\u1ed1i b\u1ed9t. B\u1ed9t c\u00e0 ph\u00ea n\u1eb1m d\u1ecdc theo c\u00e1c r\u00e3nh \u0111\u00f3 b\u1ecb b\u00e0o m\u00f2n d\u1eef d\u1ed9i: b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c, \u0111\u1eafng ng\u1eaft, ch\u00e1t kh\u00f4. Trong khi b\u1ed9t c\u00e0 ph\u00ea \u1edf c\u00e1c v\u00f9ng xung quanh g\u1ea7n nh\u01b0 ch\u01b0a k\u1ecbp chi\u1ebft xu\u1ea5t. K\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea v\u1eeba c\u00f3 v\u1ecb \u0111\u1eafng g\u1eaft \u1edf ng\u1ee5m n\u00e0y nh\u01b0ng l\u1ea1i kh\u00f4ng c\u00f3 s\u1ef1 r\u1ed7ng tu\u1ebfch \u0111\u1ed3ng nh\u1ea5t c\u1ee7a m\u1ed9t m\u1ebb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c th\u00f4ng th\u01b0\u1eddng. N\u00f3 thi\u1ebfu \u0111\u1ed3ng \u0111\u1ec1u, g\u00e2y b\u1ed1i r\u1ed1i, v\u00e0 th\u01b0\u1eddng xuy\u00ean b\u1ecb ch\u1ea9n \u0111o\u00e1n nh\u1ea7m th\u00e0nh l\u1ed7i c\u1ee1 xay.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/baristamagazineonline.com\/2014\/10\/14\/changing-espresso-extraction-scott-rao\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Scott Rao<\/strong><\/u><\/a>, m\u1ed9t trong nh\u1eefng chuy\u00ean gia \u0111\u01b0\u1ee3c tr\u00edch d\u1eabn nhi\u1ec1u nh\u1ea5t trong khoa h\u1ecdc c\u00e0 ph\u00ea, \u0111\u00e3 m\u00f4 t\u1ea3 khung chi\u1ebft xu\u1ea5t ng\u1eafn g\u1ecdn:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;\u00d4ng nh\u1eadn \u0111\u1ecbnh r\u1eb1ng b\u1ea5t k\u1ef3 m\u1ebb pha n\u00e0o d\u01b0\u1edbi m\u1ee9c \u0111\u00f3 \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb chua g\u1eaft v\u00e0 chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi, trong khi b\u1ea5t k\u1ef3 m\u1ebb n\u00e0o v\u01b0\u1ee3t qu\u00e1 m\u1ee9c \u0111\u00f3 r\u1ea5t c\u00f3 th\u1ec3 s\u1ebd b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c, ch\u00e1t kh\u00f4 v\u00e0 kh\u00e9t l\u1eb9t.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Khung chi\u1ebft xu\u1ea5t l\u00fd t\u01b0\u1edfng r\u1ea5t h\u1eb9p, v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh c\u00f3 th\u1ec3 n\u00e9m b\u1ea1n v\u0103ng ra ngo\u00e0i khung \u0111\u00f3 m\u00e0 kh\u00f4ng h\u1ec1 do b\u1ea5t k\u1ef3 bi\u1ebfn s\u1ed1 quen thu\u1ed9c n\u00e0o b\u1ecb sai l\u1ec7ch. N\u1ebfu v\u1ecb \u0111\u1eafng \u0111i k\u00e8m v\u1edbi m\u1ef1c n\u01b0\u1edbc r\u00fat kh\u00f4ng \u0111\u1ec1u tr\u00ean ph\u1ec5u pour-over (ho\u1eb7c khi b\u1ea1n g\u00f5 b\u00e1nh espresso ra th\u1ea5y c\u00e1c \u0111\u1ed1m \u0111en loang l\u1ed5 tr\u00ean b\u1ec1 m\u1eb7t s\u00e1ng m\u00e0u h\u01a1n), h\u00e3y nghi ng\u1edd hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh tr\u01b0\u1edbc khi ch\u1ea1m tay v\u00e0o n\u00fam ch\u1ec9nh c\u1ee1 xay.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/espresso-puck-channeling-extraction-faults.webp\" alt=\"espresso puck channeling\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3i ph\u00e1p cho hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh kh\u00f4ng ph\u1ea3i l\u00e0 xay th\u00f4 h\u01a1n. \u0110\u00f3 l\u00e0 c\u1ea3i thi\u1ec7n k\u1ef9 thu\u1eadt chu\u1ea9n b\u1ecb b\u00e1nh c\u00e0 ph\u00ea (puck prep). S\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 \u0111\u1ea3o b\u1ed9t ph\u00e2n ph\u1ed1i kim (WDT) ho\u1eb7c v\u00e0i c\u00e1i g\u00f5 nh\u1eb9 \u0111\u1ec3 san ph\u1eb3ng b\u1ed9t tr\u01b0\u1edbc khi n\u00e9n. D\u00f9ng \u1ea5m c\u1ed5 ng\u1ed7ng \u0111\u1ec3 ki\u1ec3m so\u00e1t chu\u1ea9n x\u00e1c v\u1ecb tr\u00ed n\u01b0\u1edbc r\u01a1i v\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng r\u00f3t. Gi\u1ea3m b\u1edbt c\u00e1c thao t\u00e1c khu\u1ea5y \u0111\u1ea3o th\u00f4 b\u1ea1o l\u00e0m x\u00e1o tr\u1ed9n l\u1edbp b\u1ed9t. T\u1ea1o r\u00e3nh l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u01a1 h\u1ecdc v\u1eadt l\u00fd (n\u01b0\u1edbc khai th\u00e1c c\u00e1c \u0111i\u1ec3m y\u1ebfu) v\u00e0 n\u00f3 c\u1ea7n m\u1ed9t gi\u1ea3i ph\u00e1p v\u1eadt l\u00fd, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh k\u00edch th\u01b0\u1edbc h\u1ea1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u1ed1i \u0111\u1ea7u tr\u1ef1c di\u1ec7n: Ch\u1ea9n \u0111o\u00e1n Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi vs Qu\u00e1 m\u1ee9c trong m\u1ecdi t\u00e1ch c\u00e0 ph\u00ea<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi v\u00e0 chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c b\u1ed9c l\u1ed9 b\u1ea3n th\u00e2n qua c\u00e1c k\u00eanh c\u1ea3m quan ho\u00e0n to\u00e0n kh\u00e1c nhau: m\u1ed9t b\u00ean t\u1ea5n c\u00f4ng l\u01b0\u1ee1i c\u1ee7a b\u1ea1n b\u1eb1ng \u0111\u1ed9 chua s\u1eafc nh\u1ecdn, b\u00ean kia h\u00fat c\u1ea1n \u0111\u1ed9 \u1ea9m trong to\u00e0n b\u1ed9 khoang mi\u1ec7ng. S\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 l\u00e0 c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n nhanh nh\u1ea5t c\u1ee7a b\u1ea1n, v\u00e0 m\u1ed9t khi \u0111\u00e3 c\u1ea3m nh\u1eadn r\u00f5 r\u00e0ng, b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd nh\u1ea7m l\u1eabn gi\u1eefa hai tr\u1ea1ng th\u00e1i n\u00e0y n\u1eefa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 quy t\u1eafc ph\u00e2n lo\u1ea1i th\u1ea7n t\u1ed1c: n\u1ebfu l\u01b0\u1ee1i b\u1ea1n co r\u00fam l\u1ea1i v\u00e0 t\u00e1ch c\u00e0 ph\u00ea cho c\u1ea3m gi\u00e1c lo\u00e3ng to\u1eb9t nh\u01b0 n\u01b0\u1edbc (axit \u0111\u00e3 tan nh\u01b0ng \u0111\u01b0\u1eddng ch\u01b0a k\u1ecbp v\u00e0o), \u0111\u00f3 l\u00e0 chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi. N\u1ebfu mi\u1ec7ng b\u1ea1n c\u1ea3m gi\u00e1c th\u00f4 r\u00e1p, kh\u00f4 kh\u1ed1c v\u00e0 v\u01b0\u01a1ng l\u1ea1i v\u1ecb \u0111\u1eafng k\u00e9o d\u00e0i kh\u00f4ng c\u00f3 ch\u00fat v\u1ecb ng\u1ecdt n\u00e0o ph\u00eda sau, m\u1ebb pha \u0111\u00e3 ch\u1ea1y qu\u00e1 l\u00e2u v\u00e0 k\u00e9o theo c\u00e1c h\u1ee3p ch\u1ea5t th\u00f4 r\u00e1p (\u0111\u00f3 l\u00e0 chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c). Hai v\u1ea5n \u0111\u1ec1 ho\u00e0n to\u00e0n kh\u00e1c nhau, hai c\u00e1ch kh\u1eafc ph\u1ee5c ho\u00e0n to\u00e0n t\u00e1ch bi\u1ec7t.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ti\u00eau ch\u00ed ch\u1ea9n \u0111o\u00e1n<\/th><th>Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi (Under)<\/th><th>Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c (Over)<\/th><th>Ma tr\u1eadn bi\u1ebfn s\u1ed1 kh\u1eafc ph\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td><strong>V\u1ecb ch\u1ee7 \u0111\u1ea1o<\/strong><\/td><td>Chua s\u1eafc nh\u1ecdn, v\u1ecb chanh g\u1eaft ho\u1eb7c t\u00e1o xanh; v\u1ecb ng\u1ecdt b\u1ecb ch\u00ecm ho\u1eb7c v\u1eafng b\u00f3ng<\/td><td>\u0110\u1eafng r\u00f5 r\u1ec7t, v\u1ecb g\u1ed7 m\u1ee5c, kh\u00e9t l\u1eb9t ho\u1eb7c th\u00f4 r\u00e1p; \u0111\u1ed9 chua b\u1ecb san ph\u1eb3ng<\/td><td>N\u1ebfu chua\/s\u1eafc: xay m\u1ecbn h\u01a1n, t\u0103ng nh\u1eb9 th\u1eddi gian pha, t\u0103ng nh\u1eb9 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc. N\u1ebfu \u0111\u1eafng\/kh\u00e9t: xay th\u00f4 h\u01a1n, r\u00fat ng\u1eafn th\u1eddi gian pha, h\u1ea1 nh\u1eb9 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc.<\/td><\/tr><tr><td><strong>C\u1ea3m gi\u00e1c v\u00f2m mi\u1ec7ng (Mouthfeel)<\/strong><\/td><td>Lo\u00e3ng, nhi\u1ec1u n\u01b0\u1edbc, r\u1ed7ng ru\u1ed9t, \u0111\u00f4i khi h\u01a1i l\u1ee3 m\u1eb7n ho\u1eb7c nh\u1ea1t nh\u00f2a<\/td><td>Kh\u00f4, ch\u00e1t se mi\u1ec7ng, th\u00f4 r\u00e1p, h\u00e1o n\u01b0\u1edbc, \u0111\u00f4i khi c\u00f3 c\u1ea3m gi\u00e1c nh\u01b0 b\u1ed9t ph\u1ea5n<\/td><td>N\u1ebfu lo\u00e3ng\/r\u1ed7ng: t\u0103ng chi\u1ebft xu\u1ea5t b\u1eb1ng c\u00e1ch xay m\u1ecbn h\u01a1n ho\u1eb7c k\u00e9o d\u00e0i th\u1eddi gian ti\u1ebfp x\u00fac. N\u1ebfu kh\u00f4\/ch\u00e1t: gi\u1ea3m chi\u1ebft xu\u1ea5t b\u1eb1ng c\u00e1ch xay th\u00f4 h\u01a1n ho\u1eb7c r\u00fat ng\u1eafn th\u1eddi gian ti\u1ebfp x\u00fac.<\/td><\/tr><tr><td><strong>H\u1eadu v\u1ecb (Finish)<\/strong><\/td><td>Ng\u1eafn ng\u1ee7i, tan bi\u1ebfn r\u1ea5t nhanh; g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 v\u1ecb ng\u1ecdt hay \u0111\u1ed9 ph\u1ee9c h\u1ee3p \u0111\u1ecdng l\u1ea1i<\/td><td>\u0110\u1eafng ch\u00e1t v\u00e0 kh\u00f4 r\u00e1p b\u00e1m dai d\u1eb3ng; h\u1eadu v\u1ecb c\u00f3 c\u1ea3m gi\u00e1c n\u1eb7ng n\u1ec1 ho\u1eb7c g\u1eaft h\u1ecdng<\/td><td>N\u1ebfu h\u1eadu v\u1ecb qu\u00e1 ng\u1eafn: h\u01b0\u1edbng t\u1edbi chi\u1ebft xu\u1ea5t nhi\u1ec1u h\u01a1n qua c\u1ee1 xay m\u1ecbn h\u01a1n, th\u1eddi gian d\u00e0i h\u01a1n ho\u1eb7c n\u01b0\u1edbc n\u00f3ng h\u01a1n. N\u1ebfu h\u1eadu v\u1ecb \u0111\u1eafng kh\u00f3 ch\u1ecbu: gi\u1ea3m chi\u1ebft xu\u1ea5t qua c\u1ee1 xay th\u00f4 h\u01a1n, th\u1eddi gian ng\u1eafn h\u01a1n ho\u1eb7c n\u01b0\u1edbc m\u00e1t h\u01a1n.<\/td><\/tr><tr><td><strong>C\u1ea3m nh\u1eadn t\u1ed5ng th\u1ec3<\/strong><\/td><td>M\u1ea5t c\u00e2n b\u1eb1ng, ch\u01b0a ph\u00e1t tri\u1ec3n h\u1ebft, ch\u01b0a ho\u00e0n thi\u1ec7n (c\u1ea3m gi\u00e1c &#8220;tr\u1ed1ng r\u1ed7ng&#8221; hay &#8220;ch\u01b0a ch\u00edn&#8221;)<\/td><td>N\u1eb7ng n\u1ec1, th\u00f4 r\u00e1p, b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 \u0111\u00e0, m\u1ec7t m\u1ecfi (c\u1ea3m gi\u00e1c &#8220;ch\u00e1y kh\u00e9t&#8221; hay &#8220;\u0111\u1ee5c ng\u1ea7u&#8221;)<\/td><td>Ch\u01b0a t\u1edbi = th\u00eam chi\u1ebft xu\u1ea5t. Qu\u00e1 m\u1ee9c = b\u1edbt chi\u1ebft xu\u1ea5t. Ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m v\u00e0 n\u1ebfm l\u1ea1i \u0111\u1ec3 x\u00e1c nh\u1eadn h\u01b0\u1edbng \u0111i.<\/td><\/tr><tr><td><strong>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ea7u ti\u00ean t\u1ed1t nh\u1ea5t<\/strong><\/td><td>Xay m\u1ecbn h\u01a1n<\/td><td>Xay th\u00f4 h\u01a1n<\/td><td>S\u1eed d\u1ee5ng c\u1ee1 xay tr\u01b0\u1edbc ti\u00ean \u0111\u1ec3 t\u1ea1o ra s\u1ef1 d\u1ecbch chuy\u1ec3n ch\u1ea9n \u0111o\u00e1n r\u00f5 r\u00e0ng v\u00e0 t\u1ee9c th\u00ec nh\u1ea5t.<\/td><\/tr><tr><td><strong>N\u1ebfu v\u1ea5n \u0111\u1ec1 v\u1eabn ti\u1ebfp di\u1ec5n sau khi \u0111\u1ed5i c\u1ee1 xay<\/strong><\/td><td>K\u00e9o d\u00e0i th\u1eddi gian pha, t\u0103ng nh\u1eb9 nhi\u1ec7t \u0111\u1ed9, ho\u1eb7c t\u0103ng t\u00ednh \u0111\u1ed3ng \u0111\u1ec1u khi ti\u1ebfp x\u00fac<\/td><td>R\u00fat ng\u1eafn th\u1eddi gian pha, h\u1ea1 nh\u1eb9 nhi\u1ec7t \u0111\u1ed9, ho\u1eb7c gi\u1ea3m b\u1edbt s\u1ef1 khu\u1ea5y \u0111\u1ea3o\/th\u1eddi gian ti\u1ebfp x\u00fac<\/td><td>Ch\u1ec9 \u0111i\u1ec1u ch\u1ec9nh m\u1ed9t \u0111\u00f2n b\u1ea9y cho m\u1ed7i l\u1ea7n th\u1eed \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 c\u00f4 l\u1eadp nguy\u00ean nh\u00e2n v\u00e0 x\u00e1c minh t\u00e1ch c\u00e0 ph\u00ea chuy\u1ec3n d\u1ecbch \u0111\u00fang h\u01b0\u1edbng.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh l\u00e0m vi\u1ec7c quan tr\u1ecdng kh\u00f4ng k\u00e9m g\u00ec b\u1ea3n th\u00e2n vi\u1ec7c ch\u1ea9n \u0111o\u00e1n: <strong>n\u1ebfm tr\u01b0\u1edbc \u2192 quy\u1ebft \u0111\u1ecbnh ch\u01b0a t\u1edbi hay qu\u00e1 m\u1ee9c \u2192 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1 \u2192 n\u1ebfm l\u1ea1i.<\/strong> Ngay kho\u1ea3nh kh\u1eafc b\u1ea1n b\u1eaft \u0111\u1ea7u \u0111i\u1ec1u ch\u1ec9nh c\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, <em>v\u00e0<\/em> th\u1eddi gian pha c\u00f9ng m\u1ed9t l\u00fac, b\u1ea1n \u0111\u00e3 \u0111\u00e1nh m\u1ea5t manh m\u1ed1i. B\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd bi\u1ebft thay \u0111\u1ed5i n\u00e0o th\u1ef1c s\u1ef1 l\u00e0m d\u1ecbch chuy\u1ec3n t\u00e1ch c\u00e0 ph\u00ea.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u00ed nghi\u1ec7m luy\u1ec7n v\u1ecb gi\u00e1c v\u1edbi ph\u1ec5u V60<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea3ng ch\u1ea9n \u0111o\u00e1n ph\u00eda tr\u00ean c\u00f2n mang t\u00ednh tr\u1eebu t\u01b0\u1ee3ng, c\u00f3 m\u1ed9t c\u00e1ch th\u1ef1c h\u00e0nh tr\u1ef1c ti\u1ebfp \u0111\u1ec3 n\u1ebfm tr\u1ecdn v\u1eb9n t\u1eebng giai \u0111o\u1ea1n chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea ch\u1ec9 trong m\u1ed9t bu\u1ed5i th\u1eed. H\u00e3y pha m\u1ed9t ph\u1ec5u V60 v\u1edbi t\u1ef7 l\u1ec7 1:16 v\u00e0 h\u1ee9ng d\u00f2ng c\u00e0 ph\u00ea ch\u1ea3y ra th\u00e0nh b\u1ed1n t\u00e1ch ri\u00eang bi\u1ec7t \u1edf c\u00e1c m\u1ed1c m\u1ed9t ph\u00fat xuy\u00ean su\u1ed1t b\u1ed1n ph\u00fat. T\u00e1ch th\u1ee9 nh\u1ea5t s\u1ebd chua s\u1eafc nh\u1ecdn (ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c axit h\u00f2a tan s\u1edbm, h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 v\u1ecb ng\u1ecdt). T\u00e1ch th\u1ee9 hai b\u1eaft \u0111\u1ea7u h\u00e9 l\u1ed9 v\u1ecb ng\u1ecdt r\u00f5 r\u1ec7t khi \u0111\u01b0\u1eddng b\u1eaft \u0111\u1ea7u tan. T\u00e1ch th\u1ee9 ba ti\u1ebfn g\u1ea7n \u0111\u1ebfn s\u1ef1 c\u00e2n b\u1eb1ng ho\u00e0n h\u1ea3o. T\u00e1ch th\u1ee9 t\u01b0 mang v\u1ecb \u0111\u1eafng v\u00e0 ch\u00e1t kh\u00f4 t\u0103ng d\u1ea7n khi c\u00e1c h\u1ee3p ch\u1ea5t n\u1eb7ng n\u1ec1 b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 s\u1ee5t gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh nh\u1ecf c\u00f3 th\u1ec3 khi\u1ebfn c\u00e1c t\u00e1ch sau k\u00e9m chu\u1ea9n x\u00e1c nh\u01b0 m\u1ed9t th\u00ed nghi\u1ec7m ki\u1ec3m so\u00e1t nghi\u00eam ng\u1eb7t, nh\u01b0ng \u0111\u00f3 kh\u00f4ng ph\u1ea3i m\u1ee5c ti\u00eau ch\u00ednh. M\u1ee5c ti\u00eau l\u00e0 gi\u00fap v\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n tr\u1ea3i nghi\u1ec7m hi\u1ec7n t\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi v\u00e0 qu\u00e1 m\u1ee9c n\u1eb1m c\u1ea1nh nhau, trong c\u00f9ng m\u1ed9t l\u1ea7n th\u1eed, t\u1eeb c\u00f9ng m\u1ed9t h\u1ea1t c\u00e0 ph\u00ea. Sau tr\u1ea3i nghi\u1ec7m \u0111\u00f3, vi\u1ec7c nh\u1eadn di\u1ec7n b\u1ea5t k\u1ef3 th\u00e1i c\u1ef1c n\u00e0o trong m\u1ebb pha h\u00e0ng ng\u00e0y s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea3n x\u1ea1 t\u1ef1 nhi\u00ean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Khi v\u1ecb gi\u00e1c c\u1ea7n m\u1ed9t \u00fd ki\u1ebfn kh\u00e1ch quan th\u1ee9 hai<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ecb gi\u00e1c l\u00e0 c\u00f4ng c\u1ee5 h\u00e0ng \u0111\u1ea7u c\u1ee7a b\u1ea1n, nh\u01b0ng kh\u00f4ng ph\u1ea3i c\u00f4ng c\u1ee5 duy nh\u1ea5t. Nh\u01b0 <a href=\"https:\/\/perfectdailygrind.com\/2020\/06\/a-guide-to-dialling-in-espresso\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Tasmin Grant<\/strong><\/u><\/a>, t\u00e1c gi\u1ea3 t\u1ea1i <em>Perfect Daily Grind<\/em>, \u0111\u00e3 nh\u1eadn \u0111\u1ecbnh:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;V\u1ecb \u0111\u1eafng, c\u1ea3m gi\u00e1c kh\u00f4 r\u00e1p v\u00e0 h\u1eadu v\u1ecb r\u1ed7ng ru\u1ed9t th\u01b0\u1eddng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c t\u00e1ch espresso c\u1ee7a b\u1ea1n \u0111\u00e3 b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng d\u1ea5u hi\u1ec7u c\u1ea3m quan \u0111\u00f3 ch\u00ednh x\u00e1c l\u00e0 nh\u1eefng g\u00ec b\u1ea3ng ph\u00eda tr\u00ean h\u1ec7 th\u1ed1ng h\u00f3a. Nh\u01b0ng v\u00e0o nh\u1eefng ng\u00e0y v\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n c\u1ea3m th\u1ea5y kh\u00f4ng \u1ed5n (m\u1ec7t m\u1ecfi, ngh\u1eb9t m\u0169i, ho\u1eb7c c\u1ea3m gi\u00e1c thi\u1ebfu nh\u1ea5t qu\u00e1n), m\u1ed9t chi\u1ebfc kh\u00fac x\u1ea1 k\u1ebf (refractometer) s\u1ebd cung c\u1ea5p cho b\u1ea1n m\u1ed9t con s\u1ed1 ho\u00e0n to\u00e0n kh\u00e1ch quan. Hi\u1ec7p h\u1ed9i C\u00e0 ph\u00ea \u0110\u1eb7c s\u1ea3n v\u00e0 h\u1ea7u h\u1ebft c\u00e1c chuy\u00ean gia h\u00e0ng \u0111\u1ea7u \u0111\u1ec1u d\u00f9ng kh\u00fac x\u1ea1 k\u1ebf \u0111\u1ec3 \u0111o T\u1ed5ng l\u01b0\u1ee3ng ch\u1ea5t r\u1eafn h\u00f2a tan (TDS) v\u00e0 t\u00ednh to\u00e1n t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t, mang l\u1ea1i cho h\u1ecd c\u00e1i nh\u00ecn chu\u1ea9n x\u00e1c v\u1ec1 v\u1ecb tr\u00ed m\u1ebb pha r\u01a1i v\u00e0o trong khung chi\u1ebft xu\u1ea5t. M\u1ed9t chi\u1ebfc kh\u00fac x\u1ea1 k\u1ebf gia \u0111\u00ecnh gi\u00e1 m\u1ec1m ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u t\u01b0\u01a1ng t\u1ef1 v\u1edbi chi ph\u00ed r\u1ea5t h\u1ee3p l\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p pha thay \u0111\u1ed5i cu\u1ed9c ch\u01a1i nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pha ch\u1ebf t\u1ea1i nh\u00e0 tu\u00e2n theo c\u00f9ng m\u1ed9t khoa h\u1ecdc chi\u1ebft xu\u1ea5t b\u1ea5t k\u1ec3 thi\u1ebft b\u1ecb n\u00e0o \u0111ang n\u1eb1m tr\u00ean qu\u1ea7y b\u1ebfp c\u1ee7a b\u1ea1n: axit tr\u01b0\u1edbc, \u0111\u01b0\u1eddng sau, r\u1ed3i m\u1edbi \u0111\u1ebfn v\u1ecb \u0111\u1eafng. Khung quy chu\u1ea9n kh\u00f4ng h\u1ec1 thay \u0111\u1ed5i. \u0110i\u1ec1u thay \u0111\u1ed5i l\u00e0 <em>\u0111\u00f2n b\u1ea9y n\u00e0o d\u1ec5 can thi\u1ec7p nh\u1ea5t<\/em> v\u00e0 <em>sai l\u1ea7m n\u00e0o d\u1ec5 m\u1eafc ph\u1ea3i nh\u1ea5t<\/em> t\u00f9y thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">So s\u00e1nh French Press, V60 v\u00e0 Espresso<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi <strong>French press<\/strong>. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p bao dung nh\u1ea5t trong c\u1ea3 ba v\u00ec vi\u1ec7c ng\u00e2m \u1ee7 ho\u00e0n to\u00e0n gi\u1eef cho m\u1ecdi h\u1ea1t b\u1ed9t ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc trong c\u00f9ng m\u1ed9t kho\u1ea3ng th\u1eddi gian: kh\u00f4ng c\u00f3 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y ph\u1ea3i \u0111i\u1ec1u ph\u1ed1i, kh\u00f4ng c\u00f3 g\u00f3c r\u00f3t n\u01b0\u1edbc ph\u1ea3i b\u1eadn t\u00e2m. Nh\u01b0ng bao dung kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng th\u1ec3 sai. \u0110\u1ec3 ng\u00e2m qu\u00e1 b\u1ed1n ph\u00fat, nh\u1eefng h\u1ee3p ch\u1ea5t \u0111\u1eafng ch\u00e1t s\u1ebd b\u1eaft \u0111\u1ea7u tr\u00e0n qua ranh gi\u1edbi. Xay th\u00f4, ng\u00e2m b\u1ed1n ph\u00fat, r\u1ed3i r\u00f3t ra ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pour-over<\/strong> (V60, Chemex) l\u1ea1i l\u00e0 m\u1ed9t sinh v\u1eadt ho\u00e0n to\u00e0n kh\u00e1c. N\u01b0\u1edbc di chuy\u1ec3n qua l\u1edbp b\u1ed9t nh\u1edd tr\u1ecdng l\u1ef1c, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a b\u1ea5t k\u1ef3 s\u1ef1 thi\u1ebfu nh\u1ea5t qu\u00e1n n\u00e0o trong d\u00f2ng r\u00f3t c\u1ee7a b\u1ea1n c\u0169ng s\u1ebd t\u1ea1o ra nh\u1eefng l\u00e0n \u0111\u01b0\u1eddng ch\u1ea3y nhanh v\u00e0 l\u00e0n \u0111\u01b0\u1eddng ch\u1ea3y ch\u1eadm qua b\u00e3 c\u00e0 ph\u00ea. \u0110\u00f3 ch\u00ednh l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh. M\u1ed9t chi\u1ebfc \u1ea5m c\u1ed5 ng\u1ed7ng kh\u00f4ng ph\u1ea3i m\u00f3n \u0111\u1ed3 xa x\u1ec9 \u1edf \u0111\u00e2y; n\u00f3 l\u00e0 c\u00f4ng c\u1ee5 mang l\u1ea1i cho b\u1ea1n \u0111\u1ee7 kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 v\u00e0 ph\u01b0\u01a1ng h\u01b0\u1edbng d\u00f2ng ch\u1ea3y \u0111\u1ec3 gi\u1eef cho n\u01b0\u1edbc th\u1ea5m \u0111\u1ec1u qua to\u00e0n b\u1ed9 b\u00e1nh c\u00e0 ph\u00ea.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Espresso<\/strong> l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t cao n\u01a1i c\u1ee1 xay, \u0111\u1ecbnh l\u01b0\u1ee3ng b\u1ed9t v\u00e0 th\u1eddi gian chi\u1ebft xu\u1ea5t c\u00f9ng k\u00e9o chung m\u1ed9t s\u1ee3i d\u00e2y th\u1eebng. Si\u1ebft c\u1ee1 xay m\u1ecbn h\u01a1n m\u1ed9t n\u1ea5c, shot c\u1ee7a b\u1ea1n ch\u1ea3y ch\u1eadm l\u1ea1i, th\u1eddi gian ti\u1ebfp x\u00fac t\u0103ng l\u00ean, v\u00e0 b\u1ea1n l\u1eadp t\u1ee9c d\u1ecbch chuy\u1ec3n sang h\u01b0\u1edbng chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c. \u0110\u1ed9 nh\u1ea1y b\u00e9n c\u1ef1c cao \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao nh\u1eefng \u0111i\u1ec1u ch\u1ec9nh r\u1ea5t nh\u1ecf l\u1ea1i t\u1ea1o ra k\u1ebft qu\u1ea3 v\u00f4 c\u00f9ng kh\u00e1c bi\u1ec7t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e2y d\u1ef1ng \u0111i\u1ec3m chu\u1ea9n c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y ch\u1ecdn <strong>t\u1ef7 l\u1ec7 pha 1:16 (c\u00e0 ph\u00ea so v\u1edbi n\u01b0\u1edbc)<\/strong> l\u00e0m \u0111i\u1ec3m chu\u1ea9n trung t\u00ednh kh\u1edfi \u0111\u1ea7u. Gi\u1eef c\u1ed1 \u0111\u1ecbnh t\u1ef7 l\u1ec7 \u0111\u00f3, sau \u0111\u00f3 ch\u1ec9 d\u1ecbch chuy\u1ec3n m\u1ed9t bi\u1ebfn s\u1ed1 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m. V\u00e0 h\u00e3y duy tr\u00ec m\u1ed9t <strong>cu\u1ed1n nh\u1eadt k\u00fd pha ch\u1ebf<\/strong>. C\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, th\u1eddi gian pha, v\u00e0 h\u01b0\u01a1ng v\u1ecb t\u00e1ch c\u00e0 ph\u00ea mang l\u1ea1i. N\u1ebfu kh\u00f4ng c\u00f3 nh\u1eefng ghi ch\u00e9p \u0111\u00f3, b\u1ea1n ch\u1ec9 \u0111ang l\u1eb7p l\u1ea1i c\u00f9ng m\u1ed9t th\u1eed nghi\u1ec7m m\u1ed9t c\u00e1ch m\u00f9 qu\u00e1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc<\/strong> l\u00e0 bi\u1ebfn s\u1ed1 th\u1ea7m l\u1eb7ng trong h\u1ea7u h\u1ebft m\u1ecdi r\u1eafc r\u1ed1i chi\u1ebft xu\u1ea5t. N\u01b0\u1edbc m\u00e1y c\u00f3 \u0111\u1ed9 c\u1ee9ng cao ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ch\u1ea5t \u0111\u1ec7m l\u00e0m ph\u1eb3ng h\u01b0\u01a1ng v\u1ecb, khi\u1ebfn t\u00e1ch c\u00e0 ph\u00ea c\u00f3 v\u1ecb ngang ph\u00e8 v\u00e0 kh\u00f4 nh\u01b0 ph\u1ea5n; n\u01b0\u1edbc qu\u00e1 m\u1ec1m c\u00f3 th\u1ec3 khi\u1ebfn t\u00e1ch c\u00e0 ph\u00ea b\u1ecb lo\u00e3ng v\u00e0 ph\u00e1t tri\u1ec3n kh\u00f4ng t\u1edbi. <strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u00e1y xay<\/strong> l\u00e0 bi\u1ebfn s\u1ed1 \u1ea9n th\u1ee9 hai. N\u1ebfu b\u1ea1n \u0111ang d\u00f9ng m\u00e1y xay l\u01b0\u1ee1i dao, h\u00e3y n\u00e2ng c\u1ea5p l\u00ean <strong>m\u00e1y xay \u0111\u0129a g\u1edd (burr grinder)<\/strong> \u2014 \u0111\u00f3 l\u00e0 s\u1ef1 thay \u0111\u1ed5i ph\u1ea7n c\u1ee9ng quan tr\u1ecdng nh\u1ea5t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u1ec3 th\u1ef1c s\u1ef1 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng khung ch\u1ea9n \u0111o\u00e1n n\u00e0y.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Coffee Brew Ratios Explained: The Key to Perfect Coffee in 10 minutes \" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/QxYR8bGxFVM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng \u0111i\u1ec3m \u0111\u00fac k\u1ebft c\u1ed1t l\u00f5i v\u1ec1 chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chua v\u00e0 lo\u00e3ng ngh\u0129a l\u00e0 b\u1ea1n d\u1eebng qu\u00e1 s\u1edbm; \u0111\u1eafng v\u00e0 ch\u00e1t kh\u00f4 ngh\u0129a l\u00e0 b\u1ea1n \u0111\u00e3 \u0111i qu\u00e1 xa \u2014 \u0111\u00f3 l\u00e0 to\u00e0n b\u1ed9 khung ch\u1ea9n \u0111o\u00e1n c\u1ee7a b\u1ea1n.<\/li>\n\n\n\n<li>Ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1 duy nh\u1ea5t cho m\u1ed7i l\u1ea7n th\u1eed pha, n\u1ebfu kh\u00f4ng b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd bi\u1ebft thay \u0111\u1ed5i n\u00e0o th\u1ef1c s\u1ef1 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1.<\/li>\n\n\n\n<li>C\u00e1c t\u00edn hi\u1ec7u l\u1eabn l\u1ed9n v\u1eeba chua v\u1eeba \u0111\u1eafng h\u1ea7u nh\u01b0 lu\u00f4n ch\u1ec9 v\u1ec1 m\u1ed9t chi\u1ebfc m\u00e1y xay kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng th\u1ee9c pha b\u1ecb h\u1ecfng.<\/li>\n\n\n\n<li>T\u1ef7 l\u1ec7 pha 1:16 l\u00e0 \u0111i\u1ec3m chu\u1ea9n trung t\u00ednh c\u1ee7a b\u1ea1n, kh\u00f4ng ph\u1ea3i m\u1ed9t quy t\u1eafc c\u1ee9ng nh\u1eafc \u2014 h\u00e3y c\u1ed1 \u0111\u1ecbnh n\u00f3 tr\u01b0\u1edbc khi ch\u1ea1m v\u00e0o c\u1ee1 xay hay nhi\u1ec7t \u0111\u1ed9.<\/li>\n\n\n\n<li>M\u1ee9c \u0111\u1ed9 rang \u00e2m th\u1ea7m v\u00f4 hi\u1ec7u h\u00f3a nh\u1eefng l\u1eddi khuy\u00ean chung chung: rang \u0111\u1eadm c\u1ea7n n\u01b0\u1edbc m\u00e1t h\u01a1n, rang s\u00e1ng c\u1ea7n n\u01b0\u1edbc v\u1eeba m\u1edbi s\u00f4i.<\/li>\n\n\n\n<li>Ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0 k\u1ebb ph\u00e1 ho\u1ea1i th\u1ea7m l\u1eb7ng \u2014 n\u1ebfu m\u1ecdi \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec1u th\u1ea5t b\u1ea1i, h\u00e3y th\u1eed \u0111\u1ed5i n\u01b0\u1edbc m\u00e1y sang n\u01b0\u1edbc su\u1ed1i \u0111\u00f3ng chai tr\u01b0\u1edbc khi \u0111\u1ed5 l\u1ed7i cho k\u1ef9 thu\u1eadt.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q: T\u1ea1i sao c\u00e0 ph\u00ea c\u1ee7a t\u00f4i \u0111\u00f4i khi v\u1eeba c\u00f3 v\u1ecb chua l\u1ea1i v\u1eeba c\u00f3 v\u1ecb \u0111\u1eafng c\u00f9ng m\u1ed9t l\u00fac?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: T\u00edn hi\u1ec7u l\u1eabn l\u1ed9n \u0111\u00f3 th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 m\u00e1y xay c\u1ee7a b\u1ea1n \u0111ang t\u1ea1o ra c\u00e1c h\u1ea1t b\u1ed9t kh\u00f4ng \u0111\u1ec1u \u2014 nh\u1eefng m\u1ea9u th\u00f4 to b\u1ecb chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi sinh ra v\u1ecb chua g\u1eaft trong khi b\u1ee5i m\u1ecbn b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c sinh ra v\u1ecb \u0111\u1eafng ch\u00e1t. Kh\u00f4ng c\u00f3 c\u00f4ng th\u1ee9c n\u00e0o s\u1eeda \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t h\u1ed7n lo\u1ea1n. H\u00e3y n\u00e2ng c\u1ea5p l\u00ean m\u00e1y xay \u0111\u0129a g\u1edd \u0111\u1ec3 c\u00f3 b\u1ed9t \u0111\u1ed3ng \u0111\u1ec1u tr\u01b0\u1edbc khi thay \u0111\u1ed5i b\u1ea5t k\u1ef3 \u0111i\u1ec1u g\u00ec kh\u00e1c trong quy tr\u00ecnh c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: Quy t\u1eafc 80\/20 th\u1ef1c s\u1ef1 v\u1eadn h\u00e0nh th\u1ebf n\u00e0o khi c\u0103n ch\u1ec9nh espresso?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: C\u00e1ch ti\u1ebfp c\u1eadn 80\/20 ch\u1ec9 ra r\u1eb1ng kho\u1ea3ng 80% s\u1ef1 d\u1ecbch chuy\u1ec3n h\u01b0\u01a1ng v\u1ecb chi\u1ebft xu\u1ea5t \u0111\u1ebfn t\u1eeb vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh c\u1ee1 xay \u2014 c\u00e1c bi\u1ebfn s\u1ed1 kh\u00e1c ch\u1ec9 tinh ch\u1ec9nh 20% c\u00f2n l\u1ea1i. N\u1ebfu shot espresso b\u1ecb l\u1ec7ch, h\u00e3y \u0111\u1ed5i c\u1ee1 xay tr\u01b0\u1edbc ti\u00ean, n\u1ebfm k\u1ebft qu\u1ea3, sau \u0111\u00f3 m\u1edbi ch\u1ea1m v\u00e0o \u0111\u1ecbnh l\u01b0\u1ee3ng ho\u1eb7c l\u01b0\u1ee3ng n\u01b0\u1edbc chi\u1ebft xu\u1ea5t n\u1ebfu c\u1ea7n. \u0110i\u1ec1u n\u00e0y gi\u1eef b\u1ea1n kh\u00f4ng b\u1ecb cu\u1ed1n v\u00e0o vi\u1ec7c \u0111u\u1ed5i theo qu\u00e1 nhi\u1ec1u \u0111\u00f2n b\u1ea9y c\u00f9ng l\u00fac.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: C\u00e0 ph\u00ea chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c c\u00f3 th\u1ef1c s\u1ef1 ch\u1ee9a nhi\u1ec1u caffeine h\u01a1n kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: Kh\u00f4ng \u0111\u00e1ng k\u1ec3. Chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c k\u00e9o th\u00eam nhi\u1ec1u tannin \u0111\u1eafng v\u00e0 h\u1ee3p ch\u1ea5t l\u00e0m se mi\u1ec7ng t\u1eeb b\u00e3 c\u00e0 ph\u00ea, nh\u01b0ng caffeine \u2014 v\u1ed1n c\u00f3 \u0111\u1ed9 h\u00f2a tan r\u1ea5t cao \u2014 \u0111\u00e3 \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t t\u1eeb r\u1ea5t s\u1edbm v\u00e0 ch\u1ea1m ng\u01b0\u1ee1ng b\u00e3o h\u00f2a. B\u1ea1n \u0111ang n\u1ebfm th\u1ea5y s\u1ef1 th\u00f4 r\u00e1p, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c t\u0103ng th\u00eam. M\u1ed9t t\u00e1ch c\u00e0 ph\u00ea \u0111\u1eafng kh\u00e9t h\u01a1n kh\u00f4ng mang l\u1ea1i l\u01b0\u1ee3ng caffeine l\u1edbn h\u01a1n t\u01b0\u01a1ng \u1ee9ng; n\u00f3 ch\u1ec9 tr\u1eebng ph\u1ea1t v\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n nhi\u1ec1u h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: Hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh c\u00f3 th\u1ec3 x\u1ea3y ra ngay c\u1ea3 khi c\u1ee1 xay tr\u00f4ng c\u00f3 v\u1ebb ho\u00e0n h\u1ea3o kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: C\u00f3, v\u00e0 \u0111\u00f3 l\u00e0 \u0111i\u1ec1u khi\u1ebfn n\u00f3 tr\u1edf n\u00ean r\u1ea5t d\u1ec5 g\u00e2y nh\u1ea7m l\u1eabn. T\u1ea1o r\u00e3nh l\u00e0 l\u1ed7i ph\u00e2n b\u1ed1 v\u1eadt l\u00fd \u2014 n\u01b0\u1edbc t\u00ecm th\u1ea5y c\u00e1c \u0111i\u1ec3m y\u1ebfu xuy\u00ean qua b\u00e1nh c\u00e0 ph\u00ea b\u1ea5t k\u1ec3 k\u00edch th\u01b0\u1edbc h\u1ea1t b\u1ed9t l\u00e0 bao nhi\u00eau. H\u00e3y t\u00ecm ki\u1ebfm c\u00e1c \u0111\u1ed1m \u0111en tr\u00ean b\u00e1nh espresso \u0111\u00e3 pha ho\u1eb7c d\u00f2ng ch\u1ea3y r\u00fat kh\u00f4ng \u0111\u1ec1u tr\u00ean ph\u1ec5u pour-over. C\u00e1ch kh\u1eafc ph\u1ee5c l\u00e0 k\u1ef9 thu\u1eadt d\u00e0n ph\u1eb3ng b\u1ed9t t\u1ed1t h\u01a1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i xay th\u00f4 h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: N\u1ebfu cold brew v\u1eabn c\u00f3 v\u1ecb chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi sau 24 gi\u1edd ng\u00e2m th\u00ec sao?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: Cold brew chi\u1ebft xu\u1ea5t r\u1ea5t ch\u1eadm v\u00ec nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc th\u1ea5p l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 h\u00f2a tan. N\u1ebfu n\u00f3 v\u1eabn b\u1ecb chua sau 24 gi\u1edd, h\u00e3y xay m\u1ecbn h\u01a1n \u0111\u1ec3 t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t thay v\u00ec k\u00e9o d\u00e0i th\u1eddi gian ng\u00e2m v\u00f4 t\u1eadn. Vi\u1ec7c khu\u1ea5y \u0111\u1ea3o \u0111\u1ec1u b\u1ed9t c\u00e0 ph\u00ea l\u00fac ban \u0111\u1ea7u c\u0169ng gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u00e3o h\u00f2a, ng\u0103n ch\u1eb7n c\u00e1c t\u00fai b\u1ed9t kh\u00f4 kh\u00f4ng bao gi\u1edd ch\u1ecbu gi\u1ea3i ph\u00f3ng ch\u1ea5t h\u00f2a tan.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: Kh\u00fac x\u1ea1 k\u1ebf gia \u0111\u00ecnh gi\u00e1 m\u1ec1m \u0111o t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t ch\u00ednh x\u00e1c \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: C\u00e1c kh\u00fac x\u1ea1 k\u1ebf gi\u00e1 m\u1ec1m h\u1eefu \u00edch v\u1ec1 m\u1eb7t \u0111\u1ecbnh h\u01b0\u1edbng nh\u01b0ng c\u00f3 th\u1ec3 b\u1ecb tr\u00f4i v\u00e0i ph\u1ea7n m\u01b0\u1eddi ph\u1ea7n tr\u0103m so v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ti\u00eau chu\u1ea9n ph\u00f2ng th\u00ed nghi\u1ec7m. T\u1ed1t nh\u1ea5t n\u00ean coi ch\u00fang nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111o t\u00ednh nh\u1ea5t qu\u00e1n \u2014 theo d\u00f5i xem con s\u1ed1 c\u1ee7a b\u1ea1n t\u0103ng hay gi\u1ea3m qua c\u00e1c m\u1ebb pha \u2014 thay v\u00ec m\u1ed9t ch\u1ec9 s\u1ed1 tuy\u1ec7t \u0111\u1ed1i. V\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n v\u1eabn ph\u1ea3i l\u00e0 v\u1ecb tr\u1ecdng t\u00e0i cu\u1ed1i c\u00f9ng v\u1ec1 s\u1ef1 c\u00e2n b\u1eb1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: M\u1ed9t sai l\u1ea7m m\u00e0 ng\u01b0\u1eddi d\u00f9ng French press hay m\u1eafc ph\u1ea3i g\u00e2y ra chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: \u0110\u1ec3 c\u00e0 ph\u00ea n\u1eb1m l\u1ea1i trong b\u00ecnh sau khi \u0111\u00e3 nh\u1ea5n p\u00edt-t\u00f4ng. Ngay c\u1ea3 khi m\u00e0ng l\u1ecdc \u0111\u00e3 h\u1ea1 xu\u1ed1ng \u0111\u00e1y, b\u00e3 c\u00e0 ph\u00ea v\u1eabn ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc v\u00e0 ti\u1ebfp t\u1ee5c chi\u1ebft xu\u1ea5t. H\u00e3y r\u00f3t to\u00e0n b\u1ed9 l\u01b0\u1ee3ng c\u00e0 ph\u00ea ra m\u1ed9t b\u00ecnh ch\u1ee9a ri\u00eang bi\u1ec7t ngay t\u1ea1i m\u1ed1c b\u1ed1n ph\u00fat. Kh\u1ed1i nhi\u1ec7t v\u00e0 l\u01b0\u1ee3ng b\u00e3 n\u1eb1m trong b\u00ecnh th\u1ee7y tinh kh\u00f4ng h\u1ec1 \u0111\u1ee9ng y\u00ean \u2014 n\u00f3 v\u1eabn \u0111ang ti\u1ebfp t\u1ee5c l\u00e0m h\u1ecfng t\u00e1ch c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nghi\u00ean c\u1ee9u v\u1ec1 s\u1ef1 gi\u1ea3i ph\u00f3ng h\u1ee3p ch\u1ea5t trong pha ch\u1ebf espresso &#8211; T\u1ea1p ch\u00ed Qu\u1ed1c t\u1ebf v\u1ec1 Quang ph\u1ed5 kh\u1ed1i (ScienceDirect)<\/li>\n\n\n\n<li>Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea: C\u00e1ch n\u00f3 gi\u00fap t\u1ea1o n\u00ean t\u00e1ch c\u00e0 ph\u00ea ho\u00e0n h\u1ea3o &#8211; Perfect Daily Grind<\/li>\n\n\n\n<li>C\u00e1ch ng\u1eebng \u0111o\u00e1n m\u00f2 trong pha ch\u1ebf c\u00e0 ph\u00ea t\u1ea1i nh\u00e0 &#8211; Ratio Coffee<\/li>\n\n\n\n<li>C\u1ea9m nang hi\u1ec7u chu\u1ea9n c\u00f4ng th\u1ee9c espresso c\u1ee7a b\u1ea1n &#8211; Perfect Daily Grind<\/li>\n\n\n\n<li>Thay \u0111\u1ed5i chi\u1ebft xu\u1ea5t Espresso &#8211; Barista Magazine Online<\/li>\n\n\n\n<li>H\u01b0\u1edbng d\u1eabn c\u0103n ch\u1ec9nh espresso t\u1eebng b\u01b0\u1edbc &#8211; Perfect Daily Grind<\/li>\n\n\n\n<li>T\u1eeb French press \u0111\u1ebfn pour-over: C\u00e1ch pha c\u00e0 ph\u00ea tuy\u1ec7t h\u1ea3o t\u1ea1i nh\u00e0 &#8211; Perfect Daily Grind<\/li>\n<\/ul>\n\n\n\n<script>{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why does my coffee sometimes taste sour and bitter at the same time?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"That mixed signal usually means your grinder is producing uneven particles\u2014large boulders under-extract into sourness while fine dust over-extracts into bitterness. No recipe adjustment fixes a chaotic particle distribution. Upgrade to a burr grinder for uniform grounds before changing anything else in your workflow.\"}},{\"@type\":\"Question\",\"name\":\"How does the 80\/20 rule actually work for dialing in espresso?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 80\/20 approach suggests that roughly 80% of extraction flavor shifts come from grind size adjustments alone\u2014the other variables fine-tune the remaining 20%. If your shot is off, change grind first, taste the result, then touch dose or yield only if needed. It keeps you from chasing multiple levers at once.\"}},{\"@type\":\"Question\",\"name\":\"Is over-extracted coffee actually stronger in caffeine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not meaningfully. Over-extraction pulls more bitter tannins and astringent compounds from the grounds, but caffeine\u2014being highly soluble\u2014extracts early and plateaus. You're tasting harshness, not extra strength. A darker, more bitter cup doesn't deliver a proportionally bigger caffeine kick; it just punishes your palate more.\"}},{\"@type\":\"Question\",\"name\":\"Can channeling happen even when my grind size looks perfect?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, and that's what makes it deceptive. Channeling is a physical distribution failure\u2014water finds weak spots through the coffee bed regardless of particle size. Look for dark splotches on a spent espresso puck or uneven drawdown in a pour-over. The fix is better puck prep, not a coarser grind.\"}},{\"@type\":\"Question\",\"name\":\"What if cold brew still tastes under-extracted after a 24-hour steep?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Cold brew extracts slowly because low water temperature reduces dissolution rate. If it's sour after 24 hours, grind finer to increase surface area rather than extending steep time endlessly. 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That thermal mass sitting in the glass isn't neutral\u2014it's still working against you.\"}}]}<\/script>\n\n\n\n<script>{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/coffeefactz.com\/coffee-extraction-under-vs-over-extracted\/#webpage\",\"about\":[{\"@type\":\"Thing\",\"name\":\"under-extraction vs over-extraction\"}],\"mentions\":[{\"@type\":\"Thing\",\"name\":\"under-extraction\"},{\"@type\":\"Thing\",\"name\":\"over-extraction\"},{\"@type\":\"Thing\",\"name\":\"sweetness\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/05wgwh\"},{\"@type\":\"Thing\",\"name\":\"acidity\"},{\"@type\":\"Thing\",\"name\":\"bitterness\"},{\"@type\":\"Thing\",\"name\":\"astringency\"}]}]}<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea tu\u00e2n theo m\u1ed9t chu\u1ed7i h\u00f3a h\u1ecdc nghi\u00eam ng\u1eb7t &#8211; axit h\u00f2a tan \u0111\u1ea7u ti\u00ean, sau \u0111\u00f3 \u0111\u1ebfn \u0111\u01b0\u1eddng, r\u1ed3i \u0111\u1ebfn c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng &#8211; v\u00e0 \u0111i\u1ec3m b\u1ea1n d\u1eebng l\u1ea1i quy\u1ebft \u0111\u1ecbnh m\u1ecdi th\u1ee9 trong t\u00e1ch. Hi\u1ec3u r\u00f5 chu\u1ed7i n\u00e0y gi\u00fap b\u1ea1n ch\u1ea9n \u0111o\u00e1n m\u1ecdi m\u1ebb pha l\u1ed7i ch\u1ec9 trong v\u00e0i gi\u00e2y.<\/p>\n","protected":false},"author":1,"featured_media":49484,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","_members_access_role":[],"_members_access_error":"","rank_math_title":"Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea: Chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi vs Qu\u00e1 m\u1ee9c","rank_math_description":"\u0110\u1eafng v\u00e0 chua kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t l\u1ed7i. Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea tu\u00e2n theo m\u1ed9t chu\u1ed7i h\u00f2a tan nghi\u00eam ng\u1eb7t - kh\u00e1m ph\u00e1 c\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 kh\u1eafc ph\u1ee5c t\u1eebng m\u1ebb pha ngay.","rank_math_canonical_url":"","rank_math_focus_keyword":"chiet xuat ca phe","_wpscp_schedule_draft_date":"","_wpscp_schedule_republish_date":"","_wpscppro_advance_schedule":false,"_wpscppro_advance_schedule_date":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_bluesky_share_type":"","_mastodon_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"","timeOption":"","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":""},"_wpsp_active_default_template":true},"categories":[133],"tags":[],"class_list":["post-54477","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pha-che"],"uagb_featured_image_src":{"full":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee.webp",1280,720,false],"thumbnail":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee-150x150.webp",150,150,true],"medium":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee-300x169.webp",300,169,true],"medium_large":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee-768x432.webp",768,432,true],"large":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee-1024x576.webp",1024,576,true],"1536x1536":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee.webp",1280,720,false],"2048x2048":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/under-extracted-vs-over-extracted-coffee.webp",1280,720,false]},"uagb_author_info":{"display_name":"Pham Toan","author_link":"https:\/\/coffeefactz.com\/vi\/author\/pham-toan\/"},"uagb_comment_info":0,"uagb_excerpt":"Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea tu\u00e2n theo m\u1ed9t chu\u1ed7i h\u00f3a h\u1ecdc nghi\u00eam ng\u1eb7t - axit h\u00f2a tan \u0111\u1ea7u ti\u00ean, sau \u0111\u00f3 \u0111\u1ebfn \u0111\u01b0\u1eddng, r\u1ed3i \u0111\u1ebfn c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng - v\u00e0 \u0111i\u1ec3m b\u1ea1n d\u1eebng l\u1ea1i quy\u1ebft \u0111\u1ecbnh m\u1ecdi th\u1ee9 trong t\u00e1ch. Hi\u1ec3u r\u00f5 chu\u1ed7i n\u00e0y gi\u00fap b\u1ea1n ch\u1ea9n \u0111o\u00e1n m\u1ecdi m\u1ebb pha l\u1ed7i ch\u1ec9 trong v\u00e0i&hellip;","_links":{"self":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/comments?post=54477"}],"version-history":[{"count":1,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54477\/revisions"}],"predecessor-version":[{"id":54492,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54477\/revisions\/54492"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/media\/49484"}],"wp:attachment":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/media?parent=54477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/categories?post=54477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/tags?post=54477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}