Why Your Freshly Ground Coffee Is Sour (And How to Fix It)
Listen up: If you’re grinding your own beans and ending up with astringent, sour brews, you’re not alone. The issue isn’t always the beans or your setup—it’s often how you’re handling the grind. Pre-ground coffee feels effortless, but freshly ground beans demand precision. The key lies in balancing grind size, outgassing, and extraction. Astringency isn’t a flaw—it’s a signal. It happens when too much tannic acid is extracted, usually due to over-extraction or a grind that’s too fine. Your current setup—grinding with a ~$70 manual grinder—might be part of the problem. While it’s rated well for its price, low-quality grinders…
