In Europe, coffee drinkers are more likely to leisurely sip their espresso. The answer is simple: you’re probably drinking the espresso much faster. Why does it seem like you’re getting more caffeine from a one-ounce espresso shot than you do from an eight-ounce cup of coffee? You can’t argue with the numbers, but that leaves one big question unanswered. (Coffee from a French press contains less caffeine than espresso, because the grounds are larger.) That results in a highly-caffeinated brew. Just about all of the available caffeine is transferred during the 20-30 seconds while hot water is being forced through the grounds.Īnd since a greater amount of coffee grounds is used to make espresso, there’s more caffeine to be transferred to the water. What accounts for the difference?īasically, the way that espresso is made.įine espresso grounds provide a larger surface area for the pressurized water to penetrate quickly. That equals about 12mg per ounce of coffee, compared with the 64mg in an ounce of espresso. That’s why an eight-ounce cup of Starbucks Pike Place medium roast contains about 155mg of caffeine, well above average.īut let’s stick with 96mg for eight ounces of drip coffee. In turn, that means some cups of coffee (or shots of espresso) have more caffeine than others. The variety and quality of the beans, the type of roast, and the grind each has a big impact on how much caffeine coffee contains. Having a doppio instead of a single shot? That double shot will contain about one-third more caffeine than a cup of coffee. That makes one fact pretty clear: you’ll get less caffeine from an espresso shot than you’ll get from a cup of coffee. The average one-ounce shot of espresso contains 64 milligrams. The average eight-ounce cup of brewed coffee contains 96 milligrams of caffeine. The bigger questions, when comparing caffeine content for the two, are how much of each you’re likely to drink – and how quickly you’re likely to drink it. It’s really the coffee maker and the coffee brewing methods that make the difference. The caffeine content is different simply because the brew you get from your Nespresso or espresso machine is really nothing more than highly-concentrated coffee. In that case, the amount of caffeine that makes it to your cup has nothing to do with beans. But let’s assume that we’re comparing regular coffee and espresso made from the same type of beans. A cup of dark roast may actually have a higher caffeine level, because you have to put more ground coffee into the machine to make it.) (By the way, the widespread “knowledge” that light roasts contain more caffeine than darker roasts isn’t necessarily accurate. Robusta beans have about twice the caffeine content as Arabica beans, so espresso made with robusta is likely to contain more caffeine than espresso made from Arabica. In fact, that’s what Starbucks uses for its espresso. However, more flavorful Arabica beans are commonly used to make espresso in America. “Classic Italian” espresso is normally made using robusta beans, because they produce a thicker and richer crema. Almost all coffee sold in America is made from either Arabica or robusta coffee beans. There’s no such thing as “espresso” beans.
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