Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat water until near boiling before forcing it through tightly packed finely ground coffee into a portafilter to extract an espresso that is concentrated. Many models let you control important espresso variables like temperature and pressurization. https://www-coffeee-uk17009.blogofoto.com/61050828/7-simple-strategies-to-completely-rocking-your-best-home-espresso-machine