(the) D-42

Chill a cocktail coupe in advance to ensure it's perfectly frosty.

Add the Calvados, triple sec, Sambuca, and freshly squeezed lime juice into a cocktail shaker.

Enhance the mixture with a few dashes of Aztec Chocolate bitters.

Fill the shaker with ice and shake vigorously to combine and chill the ingredients thoroughly.

Strain the mixture into the prepared, frozen coupe glass.

Serve immediately and enjoy the complex flavors of the cocktail.