Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat the water to near boiling point before forcing it through finely ground coffee packed tightly inside a portafilter. This results in a concentrated espresso. Many models let you control key espresso factors such as temperature https://coffeeeuk22578.blogdosaga.com/29759276/bean-to-cup-espresso-machine-explained-in-less-than-140-characters