Espresso guide
Why your espresso tastes bitter
A bitter, harsh or drying shot usually means over-extraction — the water spent too long on the coffee and pulled out the compounds you don't want.
How to tell it's over-extracted
Over-extracted espresso tends to be:
- Bitter or harsh, with a burnt or ashy edge
- Drying on the tongue, like over-steeped black tea
- Heavy and muted — the sweetness and origin character are buried
In the cup, look for a slow, thin stream that drips rather than flows, a shot time well past 30 seconds for a 1:2 ratio, and dark, patchy crema.
The one change to make next
Grind slightly coarser. A coarser grind lets the water through faster, shortening the extraction and leaving the harsh compounds behind.
Keep your dose, yield and beans the same so you can taste exactly what the adjustment changed. One variable at a time is how you actually learn your machine.
If it's still bitter
Shorten the yield slightly (for example from 36g to 32g out of an 18g dose) to cut the shot before the bitter tail end. Very dark roasts are also naturally more bitter — they often taste best with a slightly coarser grind and a shorter ratio.
If your machine runs hot, a lower brew temperature can help too — but change that only after the grind, so you can tell what made the difference.