The Undead Gentleman

1.5 oz Aged Jamaican Rum
1 oz Lemon Hart 151 Rum
0.5 oz Lime Juice
0.5 oz Grapefruit Juice
0.5 oz Falernum
0.5 oz Cinnamon Syrup
1 dash Angostura Bitters

Shake all ingredients and double strain into chilled cocktail or coupe glass that has been rinsed with Absinthe. Garnish with lime & grapefruit twists, twisted together.

Good combo of flavors and nicely potent as any zombie riff should be. You definitely notice the full ounce of Lemon Hart 151. Lemon Hart availability comes and goes. If it's not available, then sub Hamilton's 151 Demerara Rum. Also, I didn't have any aged Jamaican rum, so I substituted with 0.5 oz Smith & Cross (Jamaican, but young) and 1 oz 12-year El Dorado (aged, but not Jamaican). 

Martin Cate of Smuggler's Cove fame. I came across the recipe in the fun book Professor Cocktail's Zombie Horde: Recipes for the World's Most Lethal Drink by David J Montgomery.