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