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Fluffy Unicorn 'Box' Cake

This fluffy unicorn cake is a magical and colorful dessert that is sure to impress your guests. The light and fluffy cake is shaped like a unicorn (including the horn!), making this a perfect dessert for any celebration.

Tasty Team
84% would make again

Under 30 minutes

Fluffy Unicorn 'Box' Cake

Under 30 minutes


for 8 servings

  • 1 box angel food cake mix
  • ½ cup water, plus more according to packaging instructions
  • 4 drops green food coloring
  • 4 drops purple food coloring
  • 4 drops pink food coloring
  • 2 cups mini marshmallows
  • ¾ cup powdered sugar (180 g)
  • 4 tablespoons unsalted butter
  • 10 drops blue food coloring
  • multicolor sprinkle, for decorating

Nutrition Info

  • Calories 375
  • Fat 5g
  • Carbs 77g
  • Fiber 0g
  • Sugar 59g
  • Protein 4g

Estimated values based on one serving size.


  1. Preheat the oven according to the package instructions. Line a 9-inch round cake pan with parchment paper and grease well.
  2. Pour the cake mix into a large bowl and add water. Mix well.
  3. Divide the cake batter evenly between three bowls and add a different food coloring to each one, mixing well.
  4. Pour the batters into the prepared cake pan. Bake according to the package instructions, until a toothpick inserted in the center comes out clean.
  5. Let cool, then invert the cake onto a serving plate, removing the parchment paper.
  6. In a large skillet over medium heat, add ½ cup water, the marshmallows, powdered sugar, butter, and blue food coloring. Stir, and cook until the marshmallows melt completely and the color is even.
  7. Pour the marshmallow mixture over the cake, top with multi-colored sprinkles, and refrigerate for at least 2 hours.
  8. Slice and serve.
  9. Enjoy!
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Fluffy Unicorn 'Box' Cake