How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This method of brewing produces an even stronger drink than drip coffee. The machines require nine bars of pressure to extract the flavor from the ground. There are three types https://coffeee72260.tblogz.com/coffee-machines-espresso-s-history-of-coffee-machines-espresso-in-10-milestones-43898599