Prepare the following:
Cookie dough:
– All-purpose flour
– Vanilla extract
– Large egg
– Extra fine granulated sugar
– Unsalted butter
– Rainbow sprinkles
– Kosher salt
– Baking soda
– Baking powder
– Cornstarch
Cake batter frosting:
– Confectioners’ sugar
– Dry vanilla cake mix
– Unsalted butter
– Vanilla extract
– Pink food coloring