Choosing the Best Ground Coffee For Your Espresso Machine If you own an espresso machine you will need to ensure that the coffee you grind is of top quality. This is because espresso machines require a fine grind to ensure maximum extraction. Extraction is when water passes through coffee grounds https://wwwcoffeeeuk73000.aboutyoublog.com/31190461/10-things-people-get-wrong-about-the-word-coffee-espresso-machines