How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines make use of pressure to push water through coffee grounds. This type of brewing results in more strength than drip coffee. These machines require 9 bars of pressure to extract flavor from the grounds. Espresso machines are available https://coffeee57011.blogripley.com/30370182/the-step-by-step-guide-to-choosing-the-right-coffee-machines-espresso