How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This type of brewing makes more flavor than drip coffee. These machines require nine bars of pressure to extract the flavor from the ground. There are three main kinds of https://coffeeeuk03002.review-blogger.com/52168673/a-guide-to-coffee-machines-espresso-from-beginning-to-end