How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This type of brewing makes a stronger drink than drip coffee. The machines require nine bars of pressure in order to extract the flavor from the ground. There are three https://wwwcoffeeeuk87064.thelateblog.com/30292819/what-is-coffee-machines-espresso-what-are-the-benefits-and-how-to-use-it