Rainbow Rice Krispies Cake Recipe

Dive into the enchanting world of vibrant colors and delightful tastes with the Rainbow Rice Krispies Cake. This no-bake cake combines the classic crunchy texture of Rice Krispies with the whimsical joy of bright rainbow layers, making it a perfect addition to any celebration. Simple to make and even more fun to eat, this cake is an absolute crowd-pleaser that brings a pop of color to any table.


  • Rice Krispies cereal: 10 cups (250 grams)
  • Large marshmallows: 18 ounces (about 70 large marshmallows)
  • Unsalted butter, melted: 5 tablespoons (70 grams)
  • Gel food coloring (red, orange, yellow, green, blue, purple)


  1. Prep your pan: Spray a 10” bundt cake pan with non-stick cooking spray and set aside.
  2. Melt the marshmallows: In a large bowl, combine marshmallows with melted butter. Microwave on high for 90 seconds, stir, and heat for an additional 30 seconds if needed.
  3. Color the marshmallows: In a medium bowl sprayed with non-stick cooking spray, measure 89 grams of melted marshmallows. Add food coloring (start with red) and mix well. If needed, microwave for 20 seconds to enhance color mixing.
  4. Add the cereal: Measure out 41 grams of Rice Krispies, mix into the colored marshmallow. Spread the mixture evenly into the bundt pan using hands well-coated in cooking spray.
  5. Repeat for all colors: Clean and dry the bowl, then repeat steps 3-4 for each color layer.
  6. Set the cake: Once all layers are added, cover the bundt pan with plastic wrap. Let it sit at room temperature for an hour before slicing.

Prep Time: 60 minutes Cook Time: 0 minutes Total Time: 1 hour Yield: 1 cake Category: Dessert Method: No-bake Cuisine: American Diet: Vegetarian


  • Use gel food coloring for vibrant colors.
  • Keep the cake at room temperature for up to 3 days.
  • Remember, the stickier the process, the more generous you should be with the non-stick spray!


  • Can I make this cake ahead of time? Yes, you can prepare this cake a day in advance. Just ensure it is covered and stored at room temperature.
  • What’s the best way to slice this cake? Use a sharp knife dipped in hot water and wiped dry for clean slices.
  • Can I use regular food coloring? Gel food coloring is recommended for its intensity and ability to mix well without adding extra liquid.

Conclusion: The Rainbow Rice Krispies Cake is more than just a treat; it’s a festive spectacle that invites smiles and admiration from everyone who sees it. Whether you’re celebrating a birthday, a holiday, or any special occasion, this easy-to-make, delightful no-bake cake ensures that your celebration is bursting with joy and color. Get ready to dazzle your guests with this magical creation!

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