Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat the water to near boiling point and force it through finely ground coffee that is packed tightly inside a portafilter. This produces a concentrated espresso. Many models let you regulate key espresso elements like temperature https://wwwcoffeeeuk57250.blog-kids.com/30026449/best-home-espresso-machine-a-simple-definition