Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until near boiling and force it through a tightly packed finely ground coffee in an espresso portafilter, resulting in an espresso that is concentrated. Many models let you manage key espresso variables like temperature https://wwwcoffeeeuk74477.blog-gold.com/36624001/how-to-outsmart-your-boss-with-bean-to-cup-espresso-machine