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