How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing makes more strength than drip coffee. These machines require 9 bars of pressure to extract flavor from the grounds. There are three major kinds of espresso https://www-coffeee-uk39309.mpeblog.com/53455379/how-to-make-an-amazing-instagram-video-about-espresso-machine