Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until close to boiling, then force it through tightly packed finely ground coffee into an espresso portafilter, resulting in an espresso cup that is concentrated. Many models allow you to control key espresso factors https://www-coffeee-uk13681.blognody.com/29821027/11-faux-pas-that-are-actually-acceptable-to-make-with-your-best-home-espresso-machine