Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines make the water hot to close to boiling point, then force it through finely ground coffee that is packed tightly in the portafilter. This creates a concentrated espresso. Many models let you regulate key espresso elements, https://www-coffeee-uk15317.anchor-blog.com/10089400/10-fundamentals-about-best-home-espresso-machine-you-didn-t-learn-in-school