Combine ingredients in a shaker with ice. Stir gently and strain into a chilled cocktail glass.
If you can, try to track down some pumpkin-infused vodka. If not, try a blend of 2 1/2 ounces cinnamon vodka and 1/2 ounce Bols Pumpkin Smash Liqueur.
Recipe courtesy of Felix Albano, The bar at Fifty Seven Fifty Seven, New York, NY