Why does my coffee taste sour?

It's under-extracted. Grind finer, use hotter water or brew a little longer.

Try the tool →

More on brewing

• Why does my coffee taste bitter?
• What ratio of coffee to water should I use?
• What water temperature should I use?
• What grind size do I need?
• How do I make cold brew?
• Can I make espresso without a machine?
• How do I froth milk at home?

All questions →