How much caffeine is in a double shot?
                                
                                
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                                    4 min read                                
                            
                                According to the U.S. Department of Agriculture (USDA), a standard double shot of espresso contains about 126 milligrams of caffeine. However, that number is only an average, and the actual amount can vary widely depending on multiple factors, from the type of coffee bean to the brewing technique.