Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until near boiling and force it through tightly packed finely ground coffee into a portafilter to extract an espresso that is concentrated. Many models let you manage key espresso variables like temperature and pressure. https://www-coffeee-uk04163.blogpayz.com/29903180/17-reasons-why-you-should-avoid-bean-to-cup-espresso-machine