In a large bowl beat yolks with
Granulated Sugar (1/3 cup)
Vanilla Extract (1/2 Tbsp)
Ground Cinnamon (1 tsp)
Ground Nutmeg (1/2 tsp)
In another bowl beat
Heavy Cream (1 cup)
Whole Milk (1/2 cup)
until thick but still pourable.
Mix egg yolk mixture and cream together until combined.
While beating, stream in
Bourbon (1/2 cup)
Dark Rum (1/4 cup)
Brandy (1/4 cup)
Beat egg whites until soft peaks form.
Fold whites into the mixture.
Cover the container and place it outdoors (or in a cool place) for at least 12 hours and up to 72 hours. Stir every so often.
Serve with a sprinkle of cinnamon.