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 an espresso that is concentrated. Many models let you control key espresso factors like temperature and pressure. https://coffeee38766.blogadvize.com/36636638/15-of-the-best-pinterest-boards-of-all-time-about-bean-to-cup-espresso-machine