An espresso machine is used to produce the traditionally Italian coffee beverage called espresso. An espresso machine forces water at 90 C (195 F) and 9 bar of pressure through a puck of finely ground coffee. This process produces a rich, almost syrupy beverage by extracting and emulsifying the oils in the ground coffee. An ideal double shot of espresso should take 20-25 seconds to arrive, timed from when the machine's pump is first turned on. This time can be tuned by using finer or coarser ground coffee, and by altering the tamping pressure.

Some espresso machine also has a steam wand which is used to steam and froth milk for milk based espresso beverages such as the cappuccino and latte. A professional operator of such a machine is called a barista.

There are various types of espresso machine to choose from: stovetop espresso maker, steam espresso maker, piston-driven espresso maker, pump-driven espresso machine, automatic espresso machine, super automatic espresso machine.

Check out the links provided here for more information about espresso machine.

All text is available under the terms of the GNU Free Documentation License (GFDL).