While espresso has more caffeine per unit volume than most beverages, compared on the basis of usual serving sizes, a 30 mL (1 fluid ounce) shot of espresso has about half the caffeine of a standard 180 mL (6 fluid ounce) cup of drip brewed coffee, which varies from 80 to 130 mg,[1] and hence a 60 mL (2 oz) double shot of espresso has about the same caffeine as a 180 ml (6 oz) cup of drip brewed coffee. In coffee brewing terms, espresso and brewed coffee should have the same extraction (about 20% of the coffee grounds are extracted into the coffee liquid), but espresso has a higher brew strength (concentration, in terms of dissolved coffee solids per unit volume), due to having less water.
Monday, June 21, 2010
"Espresso" - 6.21.10
While espresso has more caffeine per unit volume than most beverages, compared on the basis of usual serving sizes, a 30 mL (1 fluid ounce) shot of espresso has about half the caffeine of a standard 180 mL (6 fluid ounce) cup of drip brewed coffee, which varies from 80 to 130 mg,[1] and hence a 60 mL (2 oz) double shot of espresso has about the same caffeine as a 180 ml (6 oz) cup of drip brewed coffee. In coffee brewing terms, espresso and brewed coffee should have the same extraction (about 20% of the coffee grounds are extracted into the coffee liquid), but espresso has a higher brew strength (concentration, in terms of dissolved coffee solids per unit volume), due to having less water.
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