Preheat oven to 350 degrees. Line a muffin pan with paper liners and place to the side.
In a large bowl combine the flour, sugar, baking powder, and salt. Add the butter, sour cream, egg, yolks, and vanilla and beat until smooth. Stir in the cotton candy until evenly distributed -do not over mix.
Get 3-4 small bowls scoop equal amount of cake mix in each bowl. Add 1 drop of food coloring to each bowl mixing until you get the desired color of choice.
Using a large spoon add a scoop of cake mix from each color filling the cupcake holder. Do not over fill.
Bake for 18 to 22 minutes, until a toothpick inserted in the center comes out clean.
Transfer to a wire cooling rack and allow to cool completely before frosting.
For the Frosting:
In a bowl, pour 1 1/2 teaspoons of the heavy cream over the cotton candy to melt it place to the side
In a large bowl cream together the butter and sugar until thoroughly combined. Stir in the vanilla and melted cotton candy. Beat on medium high until light and fluffy add the remaining cream.
Recipe by The Pinning Mama at https://www.thepinningmama.com/cotton-candy-cupcakes/