How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This method of brewing creates a stronger drink than drip coffee. These machines require nine bars of pressure to extract the flavor from the ground. Espresso machines are available in https://coffeee41931.blogdanica.com/29699333/10-coffee-machines-espresso-related-projects-that-stretch-your-creativity