Strawberry daiquiri cupcake
margarita cupcake
pina colada cupcake with toast coconut garnish

Peppermint schnapps with crushed peppermint garnish
apple cinnamon with apple pucker and goldschlager
fuzzy navel
You could do like a jack sparrow inspired cupcake that's rum and sambuca/ouzo. And it could be black. And glorious.