Choosing the Best Ground Coffee For Your Espresso Machine If you have an espresso machine, you'll want to make sure that the coffee you grind is of the best quality. This is because espresso machines require a fine grind to ensure maximum extraction. Extraction happens when water passes through coffee https://coffeeeuk39639.thenerdsblog.com/35437370/10-things-that-everyone-doesn-t-get-right-about-the-word-coffee-espresso-machines