How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds using pressure. This type of brewing results in more strength than drip coffee. The machines require nine bars of pressure in order to extract the flavor from the ground. Espresso machines are https://www-coffeee-uk70676.mybloglicious.com/50821255/three-greatest-moments-in-espresso-machine-history