Super Easy “Rainbow Cake” Recipe 


I’m going to be completely honest with you guys… I didn’t take step-by-step photos of the process I went through in making this cake. My sincerest apologies!

This was my first time attempting to make a rainbow cake. I haven’t toyed with food coloring in ages! And, I’ll admit, I didn’t think the recipe would make it to the blog because I’m Negative Nancy and assumed it would be a total disaster. But… it wasn’t! Yay!


I love making special treats for my kids. They don’t expect me to so, it’s a genuine surprise to them when they see me putting something together that’s meant especially for their consumption. Specifically because we try not to keep a large amount of “junk food” in the house.


This cake is extremely easy to make so, if you don’t particularly like baking or you’re new to it, have no fear. I wouldn’t even venture to call this semi-homemade. It’s more of a “doctoring up” method; making a plain, boring, white cake mix into something extraordinary that your little people will love.


What you’ll need:

1 box classic white cake mix (I used Duncan Hines)

1 cup of water

1/4 vegetable oil (I prefer to use applesauce as a substitute)

3 large egg whites

1 tsp ground cinnamon

1 tsp pure vanilla extract

1  Wilton Gel Food Color Set (containing pink, yellow, green, & blue)

1 container Pillsbury Confetti Funfetti Vanilla Flavored Frosting

1 non-stick bundt pan


  1. Preset oven to 350° and grease your bundt pan.
  2. Mix cake mix in a large bowl, following the directions outset on the reverse side of the box.
  3. Stir in the cinnamon and vanilla extract until blended throughout.
  4. Separate the cake mix between 4 different bowls as evenly as you can. For me, it worked out to be about 1+1/4 cup in each bowl.
  5. Add 1 color of gel coloring to each of the different mix batches. [Be as heavy-handed with the coloring as you like, until you are happy with the color. I, personally, squeezed in quite a bit– in order to have really saturated looking colors.]
  6. Layer colors within the pan, beginning with the color you want to see on the top arch of the cake. In my case, I used the ol’ ROY G BIV rule of thumb I was taught as a kid to remember the colors of the rainbow. So, I started out with red (using a lot of pink coloring) and followed with yellow, green, and blue.
  7. If desired, use a butter knife to swirl gently through the batter. But, be careful not to combine the colors.
  8. Bake at 350° for approximately 35 minutes, or until you can insert a knife and it comes out clean.
  9. Once the cake is baked thoroughly and you have taken it out of the oven, let it cool COMPLETELY.
  10. After cooling, ice the entire cake. This should take nearly the entire container of frosting because you want the layer to be moderately thick and even all the way around. Then, put on the sprinkles.
  11. Serve up & ENJOY!!!

I really hope you’ll try this out and that everyone with whom you share it is as crazy about it as we were! And, if you do make it, please share your opinions and pics below or on Live Oaks & Lemonade facebook page!

5 thoughts on “Super Easy “Rainbow Cake” Recipe ”

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