Coffee and Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee beans. They make a rich, tasty 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 https://www-coffeee-uk67327.blogunok.com/30019637/what-to-say-about-espresso-machine-to-your-mom