Coffee and Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped beans. They make a rich, tasty brew. Experts at the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars in order to get the most efficient extraction. Beware of https://coffeeeuk47372.blogtov.com/10248693/espresso-machine-explained-in-fewer-than-140-characters