First, mix Baker’s Request™ White Cake Mix according to the bag’s directions. Scale cake batter in your round pan of choice and size. Bake and let cool.
Pipe white frosting between two layers.
In separate bowls, lighten bright colored frostings together with white frosting to get desired pastel colors. After you’ve mixed your frostings and placed the cake on an icing turntable, use pastry bags with large star tip to apply colored icing in rows around the cake, ending in the center of the top layer.