What is a common mistake when grinding coffee?

Using the wrong grind size for the brewing method is a common mistake in the coffee-making process because different brewing methods require specific grind sizes to extract the best flavors from the coffee. For instance, a coarse grind is optimal for methods like French press, allowing for a slow extraction and avoiding bitterness. Conversely, a fine grind is necessary for espresso brewing to ensure proper pressure build-up and extraction speed. If the grind size does not match the brewing technique, it can lead to under-extraction or over-extraction, resulting in a subpar cup of coffee.

For example, if you use a fine grind for a French press, you may end up with a bitter and overly cloudy brew, while a coarse grind used in an espresso machine may yield a weak and underwhelming shot. Therefore, understanding the importance of matching the grind size with the brewing method is essential for crafting a high-quality cup of coffee.