Espresso is a method of extraction / preparation that takes finely ground coffee, compacts it into a portafilter and forces hot water through it under pressure to make a concentrated coffee beverage.
Espresso is also a 25 –35 ml beverage prepared with coffee packed in a portafilter which clean water of 195-205˚F has been forced at 9 to 10 atmospheres of pressure, and where the grind of the coffee is such that the brew time is 25 to 30 seconds.
While brewing, the flow of espresso will appear to have the viscosity of warm honey, and the resulting beverage will exhibit a thick, dark golden crema.
Espresso should be prepared specifically for and immediately served to its intended customer.
