1boxchocolate cake mixPrepared according to package instructions. (I used Betty Crocker Gluten Free Chocolate Cake Mix and added 3 eggs, 1 cup water, ½ cup vegetable oil)
For the frosting
1cupvegetable shorteningI used Crisco, half butter flavored/half regular
Preheat oven to 350°F. Line a 12-cup muffin pan with cupcake liners. Set aside.
Prepare cake mix according to package instructions. Pour into prepared muffin pan. Bake according to package instructions. (Note: I used the Betty Crocker Chocolate Cake Mix and added 1 cup water, ½ cup vegetable oil and 3 eggs at room temperature. Then baked them for 24 minutes.) Let cool.
For the frosting, place shortening in a large bowl. With an electric mixer, beat on medium for 3 minutes. Turn mixer to low and gradually add the sugar, ¼ cup milk and vanilla. Once combined, turn mixer up to medium and beat for 3 minutes. Take half of the vanilla frosting out and into another bowl. Add cocoa powder and 2 tablespoon milk. Beat on medium for about a minute.
Pour vanilla frosting into a pastry bag. Pour chocolate frosting into another pastry bag. Cut the tips of the bags off and place both bags into a third bag that's fitted with a 1M pastry tip. Pipe the swirled frosting onto cooled cupcakes. Serve immediately or store covered at room temperature for 2 days. You can store them covered in the refrigerator for up to 5 days (if they last that long because they're so tasty).