Yield: 24 servings.
- 3 white cake mixes + ingredients on the box
- Food coloring
- Buttercream Frosting
- 32 tbsp butter
- 22 cups powdered sugar
- 20-24 tbsp milk
- Red food coloring
- 1 lb. gum paste
- Gel food coloring
- 2 small ponies
- 5-6 lollopops
- Rainbow gumballs
- Making the rainbow (5-6 days in advance):
- Divide the gum paste into six portions. Color each as one of the colors of the rainbow: puple, blue, green, yellow, orange, and red.
- Roll the gum paste into long ropes. Use each of the colors to form a rainbow (purple on the inside, red on the outside). Use a paintbrush and water to bond them together. Stick toothpicks into the base while the gum paste is still soft. Set on wax paper to dry.
- With the remaining gum paste, use a rolling pin to flatten them into a rainbow-colored sheet. Use a heart-shaped cookie cutter to make rainbow hearts. Place them on the wax paper.
- Each day, flip the rainbow and hearts until they've completely dried and hardened.
- Prepare the cake mixes as directed on the box. Split into six equal portions. Color each to be one of the colors of the rainbow: purple, blue, green, yellow, orange, and red.
- Grease and flour six 9" cake pans. Pour each of the colored batters into a pan. Bake according to the package directions. Cool completely on a wire rack.
- Level each cake. Wrap them in plastic wrap and freeze overnight. Freezing the cake will make it much easier to frost and will not adversely affect the taste.
- For the frosting, cream together the butter, sugar, and milk. Leave half the frosting plain white; color the other half pink.
- Unless you have an exceptionally large stand mixer, you'll need to do this in two batches.
- Press gumballs into the base of the cake, following the color of the rainbow.
- Take each of the gum paste hearts and apply some frosting on one side. Stick them to the side of the cake, about halfway up.
- Place your rainbow on the top of the cake. The toothpicks you put into it should hold it upright.
- Pipe frosting around the base of the rainbow to cover any uneven points. I did small dollops so that it'd look like clouds.
- In retrospect, I should have kept some white frosting for the clouds. Oh well.
- Put a small amount of frosting on the feet of the ponies. Add them to the cake.
- Stick the lollipops onto the cake. Use longer-stemmed lollipops behind the rainbow and shorter ones in the front. Long stems are good because it'll anchor deep into the cake.
Adapted from Make It & Love It.