Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until near boiling and force it through tightly packed, finely ground coffee in the portafilter to create a concentrated cup of espresso. Many models let you manage key espresso variables like temperature and pressure. https://coffeee-uk71798.59bloggers.com/30260186/a-journey-back-in-time-the-conversations-people-had-about-best-home-espresso-machine-20-years-ago