Line conventional size cupcake pan with paper liners. Mix cake according to manufacturer’s instructions then use a #16 blue scoop to deposit 1.5 oz batter into each cavity. Bake at 350°F until cupcakes spring back lightly when touched. Let cool completely. Place red buttercreme into a piping bag fitted with a large open star tip, place the yellow buttercreme into a piping bag fitted with a small French star tip, place the orange buttercreme into a piping bag fitted with a medium French star tip, and place the light blue buttercreme into a piping bag fitted with a rose tip. Decorate the cupcakes using swirls, rosettes, stars, and stripes. Sprinkle with pearl sprinkles lightly before buttercreme has set.
White, Buttercreme, Buttercream, Red, Yellow, Orange, Blue, Large, Pearl, Sprinkle, Party