Combine all ingredients over ice in a shaker. Seal the shaker top and shake vigorously for 5-10 seconds or until the shaker has iced over on the surface. Strain into a coupe or martini glass.
Notes
Note: the nutrition info was calculated using Kahlua and NO simple syrup since I wasn't unable to track down the nutrition info for the less sweet coffee liqueurs like St. George's NOLA Coffee Liqueur (pictured here).