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 sucked tightly into a portafilter. This produces an intense espresso. Many models let you control key espresso factors like temperature and pressure. https://coffeee-uk05230.wssblogs.com/29867604/a-productive-rant-about-bean-to-cup-espresso-machine