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://coffeee-uk59454.dailyblogzz.com/30294098/what-coffee-machines-espresso-experts-want-you-to-learn