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 a concentrated cup of espresso. Many models let you control key espresso factors like temperature and pressure. https://coffeeeuk27628.ageeksblog.com/29163291/a-time-travelling-journey-how-people-talked-about-best-home-espresso-machine-20-years-ago