Rainbow Cake & Unicorns

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What do unicorns eat to make them fart rainbows?

Rainbow Cake | Cookie-Loves.com

No, I do not have a cake stand. Yes, a butcher block + parchment paper works JUST FINE!

Rainbow cake, obviously!

Rainbow Cake | Cookie-Loves.com

Yes, those are halloween plates. From last year. Don’t hate!

I’ve seen this cake all over the place and finally had the perfect occasion to make it this weekend: a unicorn costumed birthday party!

Rainbow Cake | Cookie-Loves.com

Making the cake was not as hard as I thought it would be. Just took a lil bit of time/patience to handle all the colors.

Rainbow Cake | Cookie-Loves.com

 It was helpful to have 3 round pans so I could finish in 2 batches. But if you have only 2 pans, 3 batches is fine too!

Rainbow Cake Process | Cookie-Loves.com

The cake turned out both beautiful and tasty, and all the unicorns loved it!

Unicorn eating Rainbow Cake | Cookie-Loves.com

The cutest rainbow unicorn eating rainbow cake!

Unicorn headresses | Cookie-Loves.com

Of course, I had to have a rainbow unicorn mohawk to match the cake.

(I started with Betty Crocker’s recipe and modified)

5.0 from 1 reviews
Rainbow Cake
Recipe type: Dessert
Cuisine: Unicorn
Prep time: 
Cook time: 
Total time: 
Serves: 15-20
Rainbow cake with white buttercream frosting.
  • 2 boxes of white cake mix (I used Pillsbury) + whatever the box tells you for eggs, oil, water
  • 1 box of food coloring
  • 1 cup shortening
  • 1 cup butter softened
  • 2 lb bag powdered sugar
  • 3 tsp vanilla
  • 4 TB milk
  1. Heat oven to 350
  2. Mix the cake mix according to box directions
  3. Divide into six small bowls (about 1 cup batter each)
  4. Use the food coloring to color each bowl of batter (Red, Orange, Yellow, Green, Blue, Purple)
  5. Use cooking spray on three 8 inch round pans
  6. Start with purple, blue and green to bake first. Pour each bowl into a separate pan.
  7. Bake for 15-20 min until toothpick inserted in the middle comes out clean.
  8. Remove from oven and let cool about 5-10 minutes. Then invert cakes onto a cooling wire rack to finish cooling completely.
  9. Clean the pans and bake the red, orange, yellow.
  10. Beat the shortening & sugar on high in an electric mixer until fluffy.
  11. Slowly add the sugar while beating on low.
  12. Add milk & vanilla.
  13. Once the cakes have cooled completely, place purple on sheet of parchment paper or your cake stand. (I don't have one)
  14. If it is really uneven, use a serrated knife to level out.
  15. Frost with a thin layer of frosting.
  16. Add the next cake layer on top and repeat until you have 6 layers.
  17. Frost the outside of the cake and decorate as you like! (Unicorn shaped sprinkles are highly recommended)


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