Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until 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://coffeee-uk79188.estate-blog.com/29325114/its-history-of-bean-to-cup-espresso-machine