Coffee and Espresso Machines Espresso machines use pressure to force water through finely ground and tamped coffee beans. They create a rich and flavorful brew. Good Housekeeping Institute experts recommend models that use a minimum of 9 bars to ensure an ideal extraction. Beware of manufacturers that boast greater pressure https://www-coffeee-uk02441.elbloglibre.com/29723873/7-easy-tips-for-totally-refreshing-your-espresso-machine