Because the ground coffee beans in cold-brewed coffee never come into contact with heated water, the process of leaching flavor from the beans produces a chemical profile different from conventional brewing methods. Coffee beans contain a number of constituent parts that are more soluble at higher temperatures, such as caffeine, oils and fatty acids. Brewing at a lower temperature results in lower acidity and lower caffeine content when brewed in equal volume. It is around 65 to 70 percent less acidic than hot drip coffee or espresso, per part. Although less caffeine is extracted with the cold brew method, a higher coffee-to-water ratio is often used, between 2 and 2 1/2 times. This may compensate for this difference in solubility, resulting in a brew with equal, if not more, caffeine (although this is unlikely).
Possibly the most popular type of coffee in the world, a cappuccino consists of three layers (kind of like a cake). The first is a shot of espresso, then a shot of steamed milk, and finally the barista adds a layer of frothed, foamy milk. This final layer can also be topped with chocolate shavings or powder. Traditionally, Italians would consume this type of coffee at breakfast.
Kelsey Casselbury is a freelance writer and editor based in central Maryland. Her clients have included Livestrong, School Nutrition magazine, What's Up? Media, American Academy of Clinical Chemistry, SmartBrief and more. She has a formal education in personal training/nutrition and a bachelor's degree in journalism from The Pennsylvania State University.