10/06/2026
One small adjustment can make a big difference in your morning cup. ☕️
If your grind is too coarse, water can move through the coffee too quickly without enough contact time to extract everything you want. The result is under-extracted coffee, which can taste thin, weak, sour or lacking in sweetness and depth.
If your grind is too fine, the opposite can happen. The water has more surface area to interact with and extracts more soluble compounds than you want. This is over-extraction, and it can leave your coffee tasting flat or muddled, with less clarity and sometimes woody or even burnt flavors.
So how fine should you grind? Start here—
Cold Brew: Coarse
French press or Percolator: Medium-coarse
Pour-over, Drip Machines or Chemex: Medium
AeroPress or Moka Pot: Medium-fine
Espresso: Fine
Still don’t know what you’re aiming for? Or maybe you don’t have a grinder of your own? Blue Star will custom grind your beans— whether you buy in person or online.
So dial in that grind for coffee that’s