Why does my coffee taste bitter? (and how to fix it right away)

Has your coffee started to taste bitter – even though you bought good beans?

You are not alone.
Bitter coffee is one of the most common problems – and it can almost always be solved.

In this guide, we'll show you exactly why your coffee turns bitter and how to fix it step by step .

Quick answer: why your coffee tastes bitter

The most common causes are:

• You're brewing too long.
• Too fine grinding
• Too hot water

The result: overextraction   (you are extracting too much flavor from the coffee)

1. You brew too long

If the coffee brews too long, it can become bitter.

Example:

• Pressed pot → over 4–5 min = bitter
• Filter → too slow flow

Solution:
Shorter brewing time = cleaner taste

2. Grinding degree too fine

The finer the coffee → the more flavor is extracted.

Too nice coffee =
too much bitterness

Solution:

• Filter → medium grind
• Press pot → coarsely ground
• Espresso → fine (but precisely adjusted)

3. Too hot water

Boiling water “burns” the coffee.

Perfect temperature: 92-96°C

Solution:

• Let the water rest for 30–60 seconds after boiling.

4. Incorrect coffee dosage

Too much coffee → intense and bitter
Too little coffee → weak and unbalanced

Good guideline:
60 grams of coffee per liter of water

5. Wrong coffee (yes, it matters)

Some coffees taste more bitter naturally:

• Too dark roast → more roasted, bitter notes
• Low quality coffee → often over roasted

Try instead:

• Light rust or medium rust
• Fresh specialty coffee
• Good dark roasted specialty coffee

Common mistakes (that ruin coffee)

❌ Boiling water directly on the coffee
❌ Cheap, old coffee
❌ Wrong grind for the brewing method
❌ Brewing time too long

How to remove bitterness immediately (checklist)

Do this:

✔ Shorter brewing time
✔ Coarser grinding
✔ Lower temperature
✔ Try different coffees

Small adjustments make a big difference

Our recommendations from Hälla Coffee Roastery

Do you want to avoid bitter coffee from the start?

Dark Roast – Original Espresso

• Taste: Chocolate, spices, fruit
  Perfect if you want smooth coffee without bitterness

👉 You can find Original Espresso here:

https://hallakafferosteri.com/kaffe/morkrostat-kaffe/espresso-blend-500g

Middle rust – Brazil

• Taste: chocolate, nuts, balanced
  Perfect if you want smooth coffee without bitterness

👉 You can find Brazil here:

https://hallakafferosteri.com/kaffe/mellanrostat-kaffe/singleorigin-brasilien-mellanrost

Light rust – Ethiopia

• Taste: fruity, fresh, elegant
  Less bitterness – more flavor

👉 You can find Ethiopian light rust here:

https://hallakafferosteri.com/kaffe/ljusrostat-kaffe/diima-lalesa-etiopien

Want to avoid guessing?

👉 With our try on box   you can try different coffees and find what suits you – without getting stuck with bitter coffee. Discover our Try Box here:

https://hallakafferosteri.com/kaffe/kaffeblandingar/prova-pa-box

Summary

Bitter coffee is most often caused by:

• Brewing too long
• Too fine grinding
• Too hot water

Adjust these – and your coffee will be instantly better

Do you want to take the next step?

👉 Read our guide:   Which coffee should I choose?

https://hallakafferosteri.com/blogg/vilket-kaffe-ska-jag-valja-guide-till-ratt-kaffebonor-2026

Have a good day!

/Kaj and Dan, Hälla Coffee Roastery