How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds with pressure. This type of brewing creates a stronger beverage than drip coffee. The machines require 9 bars of pressure to extract flavor from the grounds. Espresso machines are available in three https://wwwcoffeeeuk83610.blogsumer.com/29333900/this-is-the-history-of-coffee-machines-espresso-in-10-milestones