Preheat the oven to 325°F and line a cupcake pan with cupcake liners and set aside.
In a large mixing bowl whisk together, cake mix, all-purpose flour, granulated sugar, and salt.
1 white cake mix, 1 cup all-purpose flour, 1 cup granulated sugar, ½ teaspoon salt
Slowly, add in water, sour cream, egg whites, vegetable oil, and vanilla extract. Mix until everything has been combined.
1⅓ cup water, 1 cup sour cream, 4 large egg whites, 2 tablespoons vegetable oil, 1 teaspoon vanilla extract
Pour or spoon batter into the lined cupcake pan. Make sure to only fill about 2/3 of the cupcake liner, since the batter will rise a bit.
Bake in preheated oven for 22 minutes or until the center is baked.
Remove from the oven and allow to cool on a cooling rack.
In a small mixing bowl mix together sprinkles, candy stars, and mini-M&M’s.
¼ cup red and blue mini M&Ms, ¼ cup red sprinkles, ¼ cup holiday stars, ¼ cup blue sprinkles
Cut out the center of the cupcakes and fill with 1-2 teaspoons of sprinkled candy mixture. Add top back to the cupcake to hold filling in.
Preparing Frosting- With an electric hand mixer or a kitchen aid, cream together butter and shortening until smooth and creamy, about 3 minutes.
1 cup unsalted butter, 1 cup vegetable shortening
Add in heavy cream and vanilla extract.
¼ cup heavy cream, 2 teaspoon clear vanilla extract
Slowly, add in confectioners sugar a little at a time. If frosting is too thick you can add 1 teaspoon of heavy cream until you have reached the texture, you are looking for. Mix frosting for another 3 minutes.
5-6 cups powdered sugar
If you are wanting to dye the frosting red or blue, do so at this time.
red and blue gel food coloring
Add frosting to a piping bag and pipe cupcakes.
Top with sprinkles, star fondant, or candy stars.
Candy holiday stars, Sprinkles