Coffee and Espresso Machines Espresso machines use pressure to force water into finely ground and tamped beans. They produce a rich and delicious cup of coffee. Experts from the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars in order to achieve optimal extraction. Beware https://coffeee-uk48614.amoblog.com/the-reasons-coffee-machines-espresso-will-be-the-hottest-topic-in-2023-51682689