Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until near boiling before forcing it through a tightly packed finely ground coffee into the portafilter to create a concentrated cup of espresso. Many models allow you to control key espresso factors like temperature https://www-coffeee-uk74868.blue-blogs.com/36523252/20-truths-about-best-home-espresso-machine-busted