Coffee and Espresso Machines Espresso machines use pressure to force water through finely ground and tamped coffee beans. They make a rich and delicious brew. Good Housekeeping Institute experts recommend models that are brewed at 9 bars or less to ensure an ideal extraction. Beware of companies who claim to https://www.coffeee.uk/products/breville-barista-express-espresso-machine-stainless-steel