Rainbow Themed Cake

Hi All.

This past week-end we had a wonderful dinner party to celebrate my younger daughter’s birthday. I catered all the food since it was Saturday evening and I didn’t want to pull an all nighter cooking on Friday night. It is summer time here in Chicago, we were all outdoors. The kids had a ton of fun playing in water. The only thing I made was the Cake. A2 has been quite indecisive lately about which characters she likes. One day she likes Peppa Pig and fondly calls me “Mommy Pig” and the next day it’s Little Einstein. I decided to play it safe and made a Rainbow Themed cake. It was actually much simpler to make than some of the other cakes I have made. Total time I spent was about 6 hours or so but I didn’t do all the steps in one go so it was bits and pieces here and there.


For the cake itself, I used the recipe here.

This recipe makes 2 layers. I doubled the recipe and used 3 8 inch pans. This way I got three separate layers from each separate layer. You have to be careful when dividing the batter so all the layers are of equal height. I recommend using a measuring cup instead of eyeballing it.

Prepare 3 pans 8 inch size for baking with Parchment paper and Baking oil spray. Prepare the batter for first batch and color it Orange, Yellow and third one will be the mixture of Blue and Yellow making it Green. If you have Green color separately, that’s very well. Make sure to use enough color so the cakes come out in vibrant colors. Also, remember that cakes will look more vibrant than the batter when they come out of the oven. Bake these cakes as per instructions. Since your cakes are thinner, they will be done about 3 minutes or so before recommended time. Remove the cakes from pans and onto the cooling racks after about 10 minutes out of the oven. Clean the cake pans by wiping them off and prep them again for the next batch. For this batch, I used Blue, Purple and Red colors. Again if you don’t have Purple, you can make it by mixing Red and Blue. You do not need to mix the colors separately and then add. I usually start adding both colors to the cake batter and then adjust by whichever color is needed more.


Although the cake is simple to make, it does need lot of bowls and makes a bit of a mess so do not make it on the day of the party unless like me, that’s the only food item you are making. Once this batch is out of the oven, let it cool. I generally freeze my cakes for at least an hour before I put the crumb coat on. If you are doing the same, wrap each cake separately in plastic wrap tightly and place in the freezer. After an hour, take one cake out of the Freezer and level it. Using a cookie cutter, cut out  about 2 inches round from the middle of the cake. Do not cut out the top layer that is the Red color layer. All of them go back in the freezer while you make the Cream Cheese Frosting.


Use caution when you are handling these layers. They are very fragile and could break and you will have one less layer to use. For Cream Cheese Frosting, I used the recipe below. You will need two batches of this recipe. I made one batch and crumb coated the cake. Then next day, made the second batch and coated the cake from outside. When you stack the cake, stack all but the last layer. Fill the inside with M&Ms and then place the Top Red layer. From outside the cake looks very simple. All I did was put plenty of Rainbow colored sprinkles on it.

Cream Cheese Frosting 

  • Cream cheese at room temperature 12 Oz
  • Butter at room temperature 1 1/2 cups
  • Powdered sugar 5 1/2 cups
  • Vanilla extract 1 Tbsp.
  • In a stand mixer using paddle attachment, whip the Butter first.
  • When it has a good consistency, add vanilla Extract and Cream Cheese.
  • Once thoroughly mixed, start adding Powdered Sugar 1/2 cup at a time.
  • Be careful as the Sugar will blow up if you suddenly start the mixer at higher speed.
  • Run the Mixer at medium speed for at least 5 minutes to let everything mix properly. 
  • Use on the cake as directed.


Leave a Reply