1 box white cake mix
1 10oz can Sprite (mini can)
4 eggs
3/4 cup oil
1 3oz box instant Vanilla pudding
Mix all ingredients together, but don't over beat. Preheat oven to 350 and grease 2 (or 3) 9 inch round cake pans.
Separate mix into however many bowls of different colors you'd like. We had 4, I've seen Rainbow before with 7 bowls. Food color away. Remember, the more vivid the color, the better and brighter it will bake. For the first color, use a 1 cup (or smaller depending on how many colors you have) and drop one circle into the center of the pan. Repeat with alternating colors, dropping the next on top of one another, creating concentric circles, like above. The previous color will get pushed out as the color on top hits. Bake for 35-40 minutes or until a toothpick comes out clean. Let cool, cut tops off to make flat. You can leave the top one rounded or flatten it, whatever you like.
Icing
3 cups heavy whipping cream, beaten into soft, but firm peaks
3/4 cup powdered sugar beaten into the peaks
any food color
you want this icing pretty firm- almost like a regular buttercream icing.
Strawberries diced with a little sugar. Don't over sugar them or you'll get a ton of syrup and the cake will be really wet and can affect the icing.