Ingredients
15 Servings
For the Cupcakes:
8 tablespoons unsalted butter, softened (1 stick)
1 1/3 cups granulated sugar
2 1/4 cups cake flour
1 tablespoon baking powder
1/4 teaspoon salt
2 teaspoons vanilla extract
4 egg whites
1 1/4 cups milk
1/2 cup rainbow sprinkles
For the Frosting:
6 tablespoons unsalted butter, softened
1/4 cup shortening
1 tablespoon vanilla extract
3 1/2-4 cups powdered sugar
4-5 tablespoons milk
1/3 cup rainbow sprinkles
Preparation
