WHAT IS AN ESPRESSO? “Espresso is a 25-35ml (.85-1.2 ounce) beverage prepared from 7-9 grams (14-18 grams for a double) of coffee through which clean water of 195 °-205 °F (92 °-95°C) has been forced at 9-10 atmospheres of pressure, and where the grind of the coffee is such that the brew time is 20-30...