Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water to 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 regulate key espresso elements like temperature and pressure. https://wwwcoffeeeuk74477.blog-gold.com/36657932/17-signs-you-work-with-bean-to-cup-espresso-machine