Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water to near boiling before forcing it through tightly packed, finely ground coffee in a portafilter to extract an espresso cup that is concentrated. Many models allow you to control important espresso variables like temperature https://coffeee24351.blogchaat.com/29841493/best-home-espresso-machine-a-simple-definition