Coffee and Espresso Machines Espresso machines utilize pressure to make water into finely ground and tamped beans. They create a rich and delicious brew. Experts at the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars to get the most efficient extraction. Beware of manufacturers https://coffeeeuk69684.blogs100.com/30236719/7-things-you-ve-never-knew-about-coffee-machines-espresso