Why Is My Coffee Sour? (And How to Fix It)
Your coffee tastes sour because key variables like grind size, water temperature, or brewing time are off, causing under-extraction that emphasizes acidic compounds. A coarse grind, low water temperature (below 195°F), or too short a brew lets sharp acids dominate. To fix this, use a medium-fine grind, maintain water between 195°F-205°F, and adjust brewing time…