How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This method of brewing creates a stronger drink than drip coffee. These machines need 9 bars of pressure to extract flavor from the coffee grounds. There are three major kinds https://coffeee85867.theisblog.com/29981378/how-coffee-machines-espresso-has-changed-my-life-the-better