Coffee and Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They make a rich, delicious brew. Good Housekeeping Institute experts recommend models that brew at 9 bars minimum to ensure the best extraction. Beware of companies who claim to use more pressure https://coffeee-uk62642.ourcodeblog.com/29917999/how-coffee-machines-espresso-changed-my-life-for-the-better