Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat the water to near boiling point, then force it through finely ground coffee packed tightly into a portafilter. This creates a concentrated espresso. Many models let you control important espresso variables like temperature and pressurization. https://coffeeeuk07083.gynoblog.com/29353741/10-facts-about-best-home-espresso-machine-that-will-instantly-put-you-in-a-good-mood