Choosing the Best Ground Coffee For Your Espresso Machine If you have an espresso machine, you'll want to ensure that the coffee you use is of the highest grade. This is because espresso machines require a fine grind to ensure maximum extraction. Extraction happens when water passes through coffee grounds https://coffeeeuk07083.gynoblog.com/29354321/coffee-espresso-machines-101-your-ultimate-guide-for-beginners