How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing creates a stronger beverage than drip coffee. The machines require 9 bars of pressure to extract flavor from the coffee grounds. Espresso machines are available in https://coffeee38978.blogsidea.com/36015785/10-tips-for-coffee-machines-espresso-that-are-unexpected