Add all ingredients to a mixing glass with ice. Stir until chilled and strain into a chilled coupe glass and garnish.
Description
The chocolate bitter is a natural companion to bourbon that compliments its rich vanilla and caramel notes. If you like Negronis, you may already have the base ingredients necessary to make a Left Hand, so get your hands on some mole bitters and try it for yourself.
History
This drink is derived from the Boulevardier, a variation of the Negroni. The Boulevardier was invented in the 1920s by Harry MacElhone, who published the recipe in one of his cocktail books, according to The Bourbon Review.