# Why does my coffee taste dry, chalky or astringent? > Dry, chalky or astringent coffee is over-extracted, usually made worse by fines. Change one thing per brew, in this order: Grind coarser, then pour lower and gentler, then move some brew water to bypass. Source: https://cuplift.app/fix/astringent-coffee · Updated 18 October 2026 ## What it means Astringency isn't really a taste — it's the dry, chalky, tongue-scraping feeling you'd get from over-steeped black tea. In coffee it comes from polyphenols like chlorogenic acids: big, slow-dissolving molecules that only reach the cup when extraction runs high. Fines make it worse twice over. They extract fast themselves, and on a pour over they clog the bed and cause channelling. So it's treated like bitterness — extract less, starting with a coarser grind — with water as a later step, since very hard water can make a cup feel chalky too. ## Pour over: what to change Pour over (V60, Chemex, Kalita Wave, Origami, Orea). Try these one at a time, in this order. 1. **Grind coarser** — Go about 60 µm (2 clicks on a Comandante C40) coarser. Bigger particles and fewer fines mean less surface and a freer flow, so less is extracted — and less of the late-dissolving bitter and drying compounds make it into the cup. 2. **Pour lower and gentler** — A lower, calmer pour disturbs the bed less, extracts less, and keeps fines from migrating down and clogging the filter. 3. **Move some brew water to bypass** — Brew with about 10% less water — 225g instead of 250g — and add the difference as hot water afterwards. Less water runs through the grounds, so fewer of the late, bitter compounds come out, and the cup keeps its size and strength. 4. **Lower the temperature** — About 3°C cooler. Cooler water extracts more slowly — a gentler change than grind, so try it once grind and time have had their turn. 5. **Lower your water's mineral content** — About 20% fewer minerals — 150 to 120 ppm, say. Softer water extracts more gently, and with less buffering on the acidity it reads cleaner and brighter. 6. **Try a cleaner water profile** — Last resort. A new water changes several flavours at once, which makes it hard to tell what did what — so it comes after every single-variable change has had its go. ## Immersion: what to change Immersion (AeroPress, French Press, Hario Switch). Try these one at a time, in this order. 1. **Grind coarser** — Go about 60 µm (2 clicks on a Comandante C40) coarser. Bigger particles and fewer fines mean less surface and a freer flow, so less is extracted — and less of the late-dissolving bitter and drying compounds make it into the cup. 2. **Shorten the steep** — Press, plunge or open the valve about 15 seconds sooner, so the water has less time to reach the slow-dissolving bitter compounds. 3. **Agitate less** — Fewer stirs, or none after the bloom. Stirring speeds extraction, and it also churns fines into suspension. 4. **Move some brew water to bypass** — Brew with about 10% less water — 225g instead of 250g — and add the difference as hot water afterwards. Less water runs through the grounds, so fewer of the late, bitter compounds come out, and the cup keeps its size and strength. 5. **Lower the temperature** — About 3°C cooler. Cooler water extracts more slowly — a gentler change than grind, so try it once grind and time have had their turn. 6. **Lower your water's mineral content** — About 20% fewer minerals — 150 to 120 ppm, say. Softer water extracts more gently, and with less buffering on the acidity it reads cleaner and brighter. 7. **Try a cleaner water profile** — Last resort. A new water changes several flavours at once, which makes it hard to tell what did what — so it comes after every single-variable change has had its go. ## Cold brew: what to change Cold brew. Try these one at a time, in this order. 1. **Grind coarser** — Go about 60 µm (2 clicks on a Comandante C40) coarser. Bigger particles and fewer fines mean less surface and a freer flow, so less is extracted — and less of the late-dissolving bitter and drying compounds make it into the cup. 2. **Steep for less time** — Cut the steep by about 12.5% — two hours off a 16-hour steep. 3. **Lower your water's mineral content** — About 20% fewer minerals — 150 to 120 ppm, say. Softer water extracts more gently, and with less buffering on the acidity it reads cleaner and brighter. 4. **Try a cleaner water profile** — Last resort. A new water changes several flavours at once, which makes it hard to tell what did what — so it comes after every single-variable change has had its go. ## Change one thing at a time It's tempting to grind finer *and* raise the temperature *and* pour differently. Then the next cup is better or worse and you don't know why. One change per brew is slower on paper and much faster in practice. The [full dial-in guide](https://cuplift.app/dial-in) covers the order to fix things in when there's more than one problem. ## Questions ### Why does my coffee taste dry or astringent? Dry, chalky or astringent coffee is over-extracted, usually made worse by fines. Astringency isn't really a taste — it's the dry, chalky, tongue-scraping feeling you'd get from over-steeped black tea. In coffee it comes from polyphenols like chlorogenic acids: big, slow-dissolving molecules that only reach the cup when extraction runs high. ### How do I fix astringent coffee? Change one thing per brew. On a pour over: Grind coarser, then pour lower and gentler, then move some brew water to bypass. On an AeroPress, French Press or Hario Switch: Grind coarser, then shorten the steep, then agitate less. ## Other tastes to fix - [Why does my coffee taste sour? How to fix it](https://cuplift.app/fix/sour-coffee) - [Why does my coffee taste bitter? How to fix it](https://cuplift.app/fix/bitter-coffee) - [Why does my coffee taste weak or watery?](https://cuplift.app/fix/weak-coffee) - [Coffee too strong or heavy? How to lighten it](https://cuplift.app/fix/strong-coffee) - [Why does my coffee taste salty or metallic?](https://cuplift.app/fix/salty-coffee) - [Why does my coffee taste flat or dull?](https://cuplift.app/fix/flat-coffee)