How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing produces more strength than drip coffee. These machines require nine bar of pressure in order to extract the flavor from the ground. Espresso machines are available https://coffeee29942.actoblog.com/30366716/why-coffee-machines-espresso-might-be-your-next-big-obsession