What does uniform grind size ensure in coffee brewing?

Uniform grind size is essential in coffee brewing as it directly contributes to consistent extraction and flavor. When the coffee grounds are of similar size, they interact with water uniformly during the brewing process. This ensures that water extracts soluble compounds from the coffee at the same rate throughout the grounds.

If the grind size varies, some particles will be over-extracted while others may be under-extracted, resulting in a cup of coffee that can taste imbalanced or uneven. This lack of consistency can lead to a range of flavors being pronounced inappropriately, such as bitterness from over-extraction or sourness from under-extraction. By ensuring that all grounds are of a uniform size, the brewing process can maximize the extraction of desirable flavors, leading to a well-balanced cup that fully represents the coffee's profile.

Faster brewing time, higher caffeine content, and smoother texture may be influenced by grind size but are not guaranteed outcomes of uniformity in grind size. The primary goal of achieving a uniform grind is to ensure consistency in extraction and flavor for optimal brewing results.