Coffee Grinding: A Complete Guide for Every Brewing Method

Even the best coffee tastes poor if ground badly. Grinding controls the contact surface with water and thus the extraction speed. The wrong grind size leads to over-extraction (bitter and astringent liquid) or under-extraction (sour and weak water).

Rotary blade grinders break the beans into irregular particles (very fine powder mixed with large pieces), resulting in an uneven cup. A burr grinder (flat or conical) is the reference tool for consistent quality at home. Grinding just before brewing helps preserve much of the volatile aromatic compounds, which otherwise dissipate within minutes.