Coffee and Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped 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 get the most efficient extraction. Beware https://coffeee-uk94017.mybjjblog.com/the-top-coffee-machines-espresso-gurus-can-do-three-things-43132749