Cook Time: twenty minutes
Prep Time: ten minutes
Total Time: 30 minutes
Ingredients:
For the Cupcakes:
three Tablespoons Dutch-process cocoa powder
1/4 cup hot water
1-1/4 cups unbleached all-purpose flour
1/2 teaspoon each baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
one orange
two giant eggs, at room temperature
3/4 cup granulated sugar
1/2 cup buttermilk, at room temperature
1/2 teaspoon vanilla extract
1/4 cup unsalted butter, melted and cooled to room temperature
.
For the Frosting:
6 ounces bittersweet chocolate
one cup unsalted butter, at room temperature
two cups confectioners' sugar
Preparation:
Preheat the oven to 350 degrees F (180 degrees C). Line 12 standard muffin cups with paper liners.
In a giant bowl, whisk together the eggs and granulated sugar until well combined. Whisk in the buttermilk and vanilla, then the dissolved cocoa. Whisk in the melted butter, then the dry ingredients.
In a little bowl, stir the cocoa powder in to the hot water until it dissolves; set aside. Sift the flour, baking powder, baking soda, and salt together in to a bowl. Using the finest rasps of a handheld grater, grate the zest from the orange in to the bowl. Set aside.
Using a tablespoon, divide the batter among the muffin cups filling each about half full. Bake until the cupcakes are puffed and a skewer inserted in to the middle of comes out neat 15 to twenty minutes. Let cold on a wire rack. Remove the cupcakes from the pan.
To make the frosting, melt the chocolate and let cold to room temperature. Meanwhile, using a stand mixer, beat the butter and confectioners' sugar with the paddle on medium speed until creamy and smooth, about three minutes. Beat in the melted chocolate until combined. Fill a pastry bag fitted with a 1/2-inch star tip with the frosting and pipe a spiral on top of each cupcake.
Refrigerate the cupcakes until 30 minutes before serving to set the frosting.