Coffee and Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee 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 to get the best extraction. Beware https://www-coffeee-uk55924.therainblog.com/29074194/10-things-your-competitors-can-teach-you-about-espresso-machine