Espresso coffee (presszókávé) can be called espresso if a machine presses 88-92 degree (Celsius) water at 9 bars through a compressed cake made of 7 grams ground coffee during 20-30 seconds. The result: 25-35ml brew.
This drink is called espresso by the Italians. Shorter espresso is called ristretto, the longer is called lungo. These serve as a basis for making other coffee drinks such as cappuccino, macchiato, latte macchiato and many more. If brewed by following the above parameters from an appropriate quality coffee, a 2-4mm thick, long-lasting foam (crema) builds on the top of the espresso.