Coffee and Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped beans. They produce a rich, delicious cup. Experts from 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://wwwcoffeeeuk95674.shotblogs.com/say-yes-to-these-5-coffee-machines-espresso-tips-43845278