How to Make a Rainbow Cake in 5 Easy Steps!

I admit that at times I can be incredibly impatient. Try as I might, there are times where I’ll skim over directions. I gloss over the fine print and ultimately decide to “wing it”. This cake was one of them. As a lover of k-pop, I was watching Korean pop band April’s song, “Tinker Bell”, when I noticed a giant rainbow cake. The bright layers were nestled so delicately between layers of buttercream frosting. It looked decadent and totally kawaii! My inner girly girl squealed with excitement and knew that I had to figure out how to make this cake.

Don't you just want a bite of that?! :) Well, you can! Look below to find out how to make this easy, noob-friendly cake!
Don’t you just want a bite of that?! 🙂 Well, you can! Look below to find out how to make this easy, noob-friendly cake!

But who am I kidding. When it comes to baking I am even more of a noob. So I did what any novice baker would do– I skipped the measuring part and bought some pre-made cake mix. Perhaps it’s cheating a bit, but this activity was an absolute blast to make on Mother’s Day with my family and we ended up with a giant ROYGBIV-looking rainbow cake! So if you have a birthday or holiday coming up… or heck, if you’re just feeling in the kawaii-spirit give this simple “noob-friendly” rainbow cake a try! Have fun everyone and enjoy the recipe!

How to Make a Rainbow Cake in 5 Easy Steps! 

  • First, grab your ingredients. You will need: 3 boxes of classic white cake mix, 9 eggs, 1 1/2 cups of vegetable oil, 3 cups water, 3 containers of whipped vanilla frosting, 1 box of food coloring, and decorations to top.

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  • Second, mix all of the cake ingredients together. Add the cake mix, eggs, oil, and water together in a REALLY large mixing bowl. Mix, mix, mix until it is completely smooth.

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  • Third, grab two smaller mixing bowls and 2 whisks, (or spoons are fine too), and ladle equal amounts into each bowl for each layer of cake. For me, I put 4 cups of cake batter into each mixing bowl to make one cake layer. Then add food coloring to each bowl to make separate colors for the cake.

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  • Fourth, pop them in an oven preheated to 350 degrees (F) for 20 minutes. Make sure to do the “toothpick” test when they are done!

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  • Fifth, (and final step!), once you’ve set your cakes out to cool and they are completely cool, take a serrated knife and chop off a small portion of the top of each cake. (Leave ONE uncut as this will be the top of your cake). Frost each cake and gently stack them on top of each other. Cover the sides with frosting and decorate! Hooray! You made a rainbow cake!! Bon appetit!

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