because colourful is cooler
Easy to make with just a bit more time needed.
Mix the white cake batter as instructed by the recipe/box.
Separate batter into bowls and add colour. The number of bowls depends on how many colours you want. If doing 1 box of mix I would suggest 3 colours.
Using spoons, add coloured batter to the pans in whatever order you want.
Bake according to directions and ta-da! Rainbow cupcakes!