Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water to close to boiling, then force it through a tightly packed finely ground coffee in the portafilter to create an espresso that is concentrated. Many models let you manage key espresso variables like temperature https://coffeee-uk48614.amoblog.com/the-three-greatest-moments-in-best-home-espresso-machine-history-51712767