How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds by using pressure. This type of brewing creates a stronger beverage than drip coffee. These machines require nine bars of pressure to extract the flavor from the ground. Espresso machines are available https://coffeeeuk01982.bloguetechno.com/the-most-successful-coffee-machines-espresso-gurus-do-3-things-65121675