Coffee and Espresso Machines Espresso machines utilize pressure to make water into finely ground and tamped beans. They create a rich and flavorful 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 manufacturers https://wwwcoffeeeuk83428.total-blog.com/learn-about-coffee-machines-espresso-while-working-from-at-home-55023139