Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until close to boiling, then force it through a tightly packed, finely ground coffee in the portafilter to create a concentrated cup of espresso. Many models let you control important espresso variables like temperature https://coffeee44494.frewwebs.com/30376091/how-to-get-more-results-out-of-your-best-home-espresso-machine