Logbook · October 18, 2026
Why Is My Espresso Sour?
Sour espresso usually means under-extraction. Learn how to fix it by adjusting grind size first, then dose, yield and temperature, one variable at a time.
Read the guide| Dose | 18 g |
|---|---|
| Yield | 36 g |
| Time | 28 s |
| Taste | sweet |
| Next | Same grind. Same beans. Done. |
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The method
Grind finer. Taste again.
- One variable. Every fix changes one thing, so you know what worked.
- Log it. Dose, yield, time and taste. Then the next move.
- Upgrade last. Beans and grinder first. The machine is rarely the problem.