Espresso is a black strong coffee prepared in Italian way by forcing live steam through dark-roast coffee beans. Coffee is placed into an espresso machine designed just for this purpose and hot water is forced through the coffee at very high pressure - extracting all the flavor possible. Brewing espresso has certainly been made easier, over the years, with the advancement of more automated machines. Preparing, however, the "perfect" cup of espresso is still a real art. A 1 to 1 1/2 ounce shot of espresso should brew in 19-23 seconds. The espresso should flow out of the machine at a slow, but steady dribble. If your espresso has been perfectly brewed, the surface will be covered with a thick, foamy, golden brown crema. If the crema is good, then sugar in your espresso will float on the surface for a couple seconds. Espresso coffee, despite being a sublime experience on its own, is the foundation for a wide variety of specialty coffee drinks such as the Cappuccino.