Coffee and Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They produce a rich and delicious brew. Experts from the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars in order to achieve optimal extraction. Beware of https://coffeeeuk61568.ltfblog.com/29109408/15-up-and-coming-espresso-machine-bloggers-you-need-to-see