How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines make use of pressure to force water through coffee grounds. This type of brewing produces a stronger drink than drip coffee. These machines need 9 bars of pressure to extract flavor from the grounds. Espresso machines are available https://www-coffeee-uk04163.blogpayz.com/29839286/what-coffee-machines-espresso-experts-want-you-to-know