how much caffeine in one shot of starbucks decaf espresso?
. Regarding Starbucks decaffeinated drip coffees, one can expect between 4.8 milligrams and 11.2 milligrams of caffeine per eight ounces. . Regarding one ounce of Starbucks espresso (which is one shot in an espresso-based beverage), one can expect an average of 89 milligrams of caffeine.