Why does my coffee taste bitter?

It's over-extracted (or a very dark roast). Grind coarser, use slightly cooler water or brew shorter.

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More on brewing

• Why does my coffee taste sour?
• 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?

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