How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing results in a stronger beverage than drip coffee. These machines require 9 bars of pressure to extract flavor from the grounds. Espresso machines are available in https://coffeee35385.bloggactif.com/30587336/watch-out-how-espresso-machine-is-taking-over-and-what-you-can-do-about-it