Espresso and Caffeine

Espresso is a form of coffee made by grinding the beans very finely and subjecting them to hot water at high pressure. Espresso has a more concentrated flavor. Ounce for ounce, espresso does have more caffeine than a regular drip brew. A shot of espresso has 120 to 170 mg of caffeine, whereas a cup of coffee has 150 to 200 mg. It would take two or three espresso shots to equal the caffeine in a 16-ounce Starbucks coffee.