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Why Your Espresso Tastes Bitter — 5 Common Mistakes

A bitter espresso can ruin your latte. Luckily, bitterness has simple root causes. Fix these five issues and your espresso will taste sweeter, richer, and smoother.

⭐ 1. Your Grind Is Too Fine

A very fine grind leads to over-extraction, causing bitterness.

Fix:
Try a slightly coarser grind.
If you’re using a burr grinder, adjust it 1–2 clicks coarser.

⭐ 2. Your Shot Is Running Too Long

A long shot = harsh espresso.

Fix:
Aim for:

• 25–30 seconds
• 1:2 espresso ratio (18g in → 36g out)

If it’s running long, your grind is too fine.

⭐ 3. Your Water Is Too Hot

Cheap machines overheat and burn coffee.

Fix:
Look for machines with temperature stability, or flush the group head before brewing.

⭐ 4. Your Beans Are Old or Burnt

Stale beans = harsh flavor.

Fix:
Use beans roasted within 2–4 weeks.

Avoid very dark roasts if you dislike bitterness.

⭐ 5. Your Machine Hasn’t Been Cleaned

Old coffee oils = bitter, burnt taste.

Fix:
Backflush weekly (if machine allows).
Clean baskets, portafilters, and steam wand.

⭐ Tools That Fix Bitter Espresso

• Burr grinder (biggest improvement)
• Espresso scale
• Consistent machine

✔ Best beginner-friendly grinder
✔ Best value espresso machine