St. Patrick’s Day Cupcake: Irish Car Bomb Cupcakes

unsweetened cocoa powder (not Dutch-process)1  cup brewed coffee1 1/2 cup Guinness Extra Stout2 sticks unsalted butter, cut into 1-inch pieces2 cups sugar2 cups all-purpose flour1 1/4 teaspoons baking soda1/2 teaspoon salt2 large eggs1 teaspoon vanilla

egg whites1 ¼ cup granulated sugar2 sticks unsalted butter, softened and cubed2 sticks butter, softened and cubed1 tablespoon vanilla3-4 tablespoons of Bailey’s5-6 tablespoons Jameson