½cup(113g)( 1 stick) unsalted butter, room temperature
½cup(120ml)ginger beer, such as Gosling's
¼cup(60ml)Gosling's rum
1(1)large egg, beaten
¼cup(60ml)buttermilk, room temperature
1 ½cups(190g) all-purpose flour, sifted
1cup(200g)granulated sugar
2tablespoons(15g)cocoa powder
1teaspoon(3g)ground cinnamon
1teaspoon(3g)ground ginger
½teaspoon(3g)baking soda
½teaspoon(2g)baking powder
¼teaspoon(1g)salt
Frosting
2 ¾cup(330g)confectioners' sugar, sifted
¾cup(170g)(1 1/2 sticks) unsalted butter, room temperature
1tablespoon(15ml)Gosling's rum
1 to 2tablespoons(15 - 30 ml)ginger beer
2teaspoons(10ml)fresh lime juice
1 to 2teaspoons(3g)ground ginger, depending on how ginger-y you like the cupcakes
Instructions
Preheat the oven to 350° F. Line a cupcake pan with cupcake liners. Set aside.
Heat the butter, ginger beer and rum over low heat for about 3 minutes, until the butter melts, being careful not to boil. Set aside to slightly cool.
In a small bowl, beat together the egg and buttermilk. Set aside.
In a medium bowl, whisk together the flour, sugar, cocoa powder, cinnamon, ginger, baking soda, baking powder and salt.
Stir the warm butter rum mixture into the dry ingredients. Add the egg mixture and stir until well combined.
Fill cupcake tins three-quarters full and bake for 16 to 20 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Cool on a wire rack for 5 minutes, then remove the cupcakes from the pan and cool completely.
For the frosting, use an electric mixer and beat butter until whipped. Slowly add confectioners' sugar followed by the rum, ginger beer, lime juice and ground ginger (to taste). Transfer to a frosting bag and frost the cupcakes. Garnish with a lime wedge or candied ginger.
Notes
Store dark and stormy cupcakes in an airtight container at room temperature for 3 days. If you live in a warmer climate, store in the refrigerator to prevent frosting from melting.