Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines make the water hot to close to boiling point and force it through finely ground coffee that is packed tightly inside the portafilter. This creates a concentrated espresso. Many models let you control key espresso factors https://coffeee-uk05230.wssblogs.com/29845328/20-things-you-should-know-about-bean-to-cup-espresso-machine