Coffee intended for use in espresso machines requires a specific grind size, finer than that used for drip or French press brewing. This fine grind maximizes surface area, allowing hot water under pressure to extract the full flavor and aroma profile of the beans in a short time, creating the characteristically rich and concentrated espresso. For instance, the grind resembles granulated sugar in consistency, unlike the coarser grinds used for other brewing methods.
The correct grind size is crucial for optimal espresso extraction. Too coarse a grind results in under-extraction, producing a weak and sour brew. Conversely, too fine a grind leads to over-extraction, creating a bitter and burnt taste. Achieving this ideal fineness has evolved alongside espresso machine technology, influencing the development of specialized grinders designed specifically for espresso preparation. This pursuit of precision highlights the importance of grind size in achieving a balanced and flavorful espresso.
