A barista is someone who professionally makes coffee, especially espresso. Espresso is a coffee beverage made by forcing hot water between 190-204°F through finely ground coffee beans at high pressure. To make espresso, a barista will fill and tamp the portafilter with ground coffee beans, insert it into the espresso machine, and pull a shot that is extracted in around 25 seconds. Crema, the reddish-brown froth on top of an espresso, indicates a well-made shot and experienced barista. Other coffee drinks like lattes and cappuccinos are made by steaming milk and combining it with espresso in various proportions.