Coffee and Espresso Machines Espresso machines make use of pressure to push water through finely ground and tamped coffee beans. They create a rich, delicious cup. 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://coffeeeuk20244.develop-blog.com/36113880/a-intermediate-guide-towards-espresso-machine