Coffee and Espresso Machines Espresso machines make use of pressure to push water through finely ground and tamped coffee beans. They create a rich and delicious brew. Experts at the Good Housekeeping Institute recommend models that brew at the minimum pressure of 9 bars to achieve optimal extraction. Beware of https://coffeee-uk26624.blogsmine.com/30245208/this-is-the-intermediate-guide-for-espresso-machine