Fruity Pebbles Cake

Fruit Pebbles Cake – Fruity Pebbles infused cake layers, with a Fruity Pebbles filling and vanilla buttercream.


I’ve had this Fruity Pebbles cake on my mind since trying the Fruity Pebbles macaron ice cream sandwich from Perfect Scoop in Las Vegas last month. I was obsessed with how well they incorporated the cereal flavor into the cookie and the ice cream without just throwing in pieces of the cereal. The flavor was a part of every bite and that’s exactly what I wanted for this cake.

Trial and Error

In my first round, I used ground up cereal in place of some of the flour in the cake. It created a great flavor to the cake, but the texture was all wrong! It was too dense and fell apart really easily. I was disappointed, of course, but kept going. As I thought about how to get the Fruity Pebbles flavor into the cake, I remembered that Milk Bar has something they call “Cereal Milk.” Milk Bar creator, Christina Tosi, originally came up with this idea for a cereal panna cotta. Cereal Milk is made by soaking cereal in milk for about 20 minutes and then strain the milk. The milk remains smooth but there’s now a fabulous cereal flavor to it.

That’s exactly what I needed for this cake and it worked beautifully. With the Fruity Pebbles milk, you get a great Fruity Pebbles flavor in the cake (not too strong) and still have a fluffy, moist cake.


While I was thinking about Milk Bar, I also decided to use their cereal crunch element for this cake to add some texture to the layers. The cake is certainly a sweet one, so the added kosher salt in the crunch provides a bit of a balance.

And not one to stop there, I also wanted the filling to be flavored with Fruity Pebbles, so I ground up some more cereal and added it to my vanilla frosting. I love how it adds just one more touch of the cereal flavor and is a slightly different texture than the frosting itself. It does thicken slightly with the cereal crumbs in it.

So now with Fruity Pebbles cake layers, Fruity Pebbles filling and cereal crunch, and a whipped vanilla buttercream, this cake shouts Fruity Pebbles with every bite. It’s definitely on the sweeter side but I wouldn’t want it any other way!


Here’s a peek at how to assemble the cake. More detailed instructions can be found in the recipe below.



Fruity Pebbles Cake

Courtney Rich
Light and fluffy Fruity Pebbles flavored cake layers, topped with Fruity Pebbles filling and cereal crunch, and coated in a whipped vanilla buttercream.​
5 from 9 votes
Prep Time 1 hr
Cook Time 20 mins
Total Time 2 hrs 10 mins
Course Dessert
Cuisine Cake
Servings 1 3-layer, 8-inch cake


For the Cereal Flavored Milk

  • 1 1/4 cup (300 g) milk
  • 1 1/2 cup (180 g) Fruity Pebbles cereal
  • 1/2 tablespoon (7 g) brown sugar
  • pinch of salt

For the Funfetti Cake

  • 3 cups (345 g) cake flour
  • 1 1/3 cup (293 g) granulated sugar
  • 4 teaspoons (16 g) baking powder
  • 1/2 teaspoon (2.8 g) salt
  • 1 cup (226 g) unsalted butter, room temperature
  • 1 cup (240 g) cereal milk (recipe above)
  • 5 egg whites room temperature
  • 1 tablespoon (13 g) clear vanilla extract

For the Cereal Filling

  • 2 1/2 cups (300 g) Fruit Pebbles cereal
  • 1/2 cup (75 g) milk powder
  • 1 tablespoon (12.5 g) sugar
  • 1/4 teaspoon (1.4 g) kosher salt
  • 6 tablespoons (84.75 g) unsalted butter, melted

For the Buttercream

  • 2 1/4 cup 5 sticks (508.5 g) unsalted butter, slightly chilled
  • 6 1/2 cups (812.5 g) powdered sugar, measured and then sifted
  • 1 tablespoon (4.2 g) clear vanilla extract
  • 1/2 teaspoon (2.8 g) salt
  • 5 tablespoons (72 g) heavy whipping cream
  • *This buttercream recipe makes enough to fill and cover your cake. If you want to add additional piping you’ll want to make an extra 1/2 batch.

For the Filling

  • 2 cups frosting recipe above
  • 2/3 cup (80 g) finely ground Fruit Pebbles (about 2 cups)


For the Cereal Milk

  • Combine the milk and cereal in a medium bowl. Let sit for about 20 minutes at room temperature.
  • Strain the milk through a fine mesh sieve or strainer, collecting the milk in a small bowl. Collect 1 cup.
  • Whisk the brown sugar and salt into the milk until fully dissolved. 

For the Cake

  • Preheat your oven to 350 degrees F. Spray three 8-inch or four 6-inch round pans with nonstick spray and line the bottoms with parchment paper. Spray again and set aside.
  • In the bowl of a stand mixer fitted with the paddle attachment, combine the sugar, flour, baking powder and salt. Stir to combine. 
  • With the mixer on medium low, gradually add the butter and milk. Stir until the mixture is smooth, about 1 minute. Scrape down the sides of the bowl.
  • Add the egg whites and clear vanilla extract in three batches, scraping down the sides of the bowl after each addition.
  • Evenly divide the batter among the three pans. Bake for about 25 minutes. Let cool in the pans for about 10 minutes before inverting onto cooling racks to cool completely. Can wrap each cake layer individually with plastic wrap and freeze for up to a week.

For the Cereal Crunch

  • Preheat your oven to 275 degrees F. 
  • Pour the Fruit Pebbles into a medium bowl and crush them a little with your hands. Add the milk powder, sugar, salt, and toss to mix. Add the melted butter and toss to coat. As you toss, the butter will act as glue, binding the dry ingredients to the cereal and creating small clusters.
  • Spread the clusters on a parchment lined sheet pan and bake for 20 minutes. Cool completely before using or store in an air-tight container in the freezer for up to a month.

For the Buttercream

  • In the bowl of an electric mixer fitted with the paddle attachment, add the butter and beat on medium speed for 2 minutes, until nice and fluffy. 
  • With the mixer on low speed, gradually add the powdered sugar. Mix until combined.
  • Add the cream, salt and clear vanilla. Turn the mixer to medium-high and beat for 5 minutes.
  • Transfer 2 cups of the frosting to a medium bowl. 
  • With the remaining frosting, beat by hand with a wooden spoon to push out any air pockets before frosting the cake.

For the Filling

  • In a blender or food processor, pulse the Fruity Pebbles cereal into fine crumbs.
  • Combine the Fruity Pebbles cereal and 2 cups of frosting and stir until combined. The filling will now be a little thicker than the frosting. It will spread more like a cookie dough filling. I suggest making the filling when you're ready to use it.
  • Assembly
  • Place your cake board on a turntable. Spread a small dollop of frosting on the cake board and place the first cake layer, top side up, on the center of the cake board.
  • Carefully spread half of the Fruity Pebbles filling on the cake layer, followed by 1/2 cup to 1 cup of the Fruity Pebbles Crunch.
  • Place the second cake layer, top side up, on the fillings and repeat step 2.
  • Place the final cake layer, top side down, on the second layer of fillings. With the vanilla frosting, lightly frost the cake to create a crumb coat. (This layer of frosting is meant to be thin and does not need to be perfect. The point of the crumb coat is simply to lock in the crumbs.) Freeze the cake for 10 minutes to set the crumb coat. 
  • Continue frosting the cake with the remaining frosting and extra Fruity Pebbles Crunch. Best served day of assembly. Can also be frozen in an airtight container for up to a week.
Tried this recipe?Let us know how it was!


Courtney Rich

I’m a self-taught baker, obsessed with cake.

I long ago ditched box mixes in pursuit of melt-in-your-mouth, to-die-for flavor combinations, fillings and textures. I believe cake must be decadent, life-changing and worthy of celebration! And I believe anyone should be able to bake that kind of cake – and I’m here to teach you just that!

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Leave a Comment


  1. Thank you so much for the recipe! Did you by chance use food coloring for the cake? I made the cakes today and have frozen them but they did not have the gorgeous color seen in your photos despite using the fruity pebbles milk. Very excited to pull the finished product together for a birthday party this weekend!

    Also, do you recommend storing in the fridge once iced before serving, or leaving it in its cake stand at room temperature once iced to eat same day?

    Thanks so much for a wonderful, fun recipe!

    1. I actually did the first time, but then I just made it again this week to reshoot and didn’t add the coloring and actually really like it without it. It will give it more contrast to the filling and fruity pebbles. I’d just leave it at room temp covered if you’re serving it that day. Enjoy!

  2. Wish you would do a slower tutorial showing step by step with preparing the crunch, cake, filing and frosting 🙁

  3. 5. Evenly divide the batter among the three pans (about . Bake for about 25 minutes. Let cool in the pans for about 10 minutes before inverting onto cooling racks to cool completely. Can wrap each cake layer individually with plastic wrap and freeze for up to a week.

    I’m guessing there was a measurement that was supposed to go in the parenthesis above? I study recipes long and hard before I attempt to make them 🙂

  4. Could I use fruit loops instead? Just replace the pebbles with loops. I’m probably going to try it and be back to let you know how it goes.

  5. Can I make your sugar-free cake like this one? With the cereal milk? I just don’t want the refined sugar.

  6. Hi Courtney!

    Quick question — the cereal milk says 1/2 TABLESPOON, but 110g of brown sugar. Is that the correct weight?

    Thank you! Can’t wait to make this for my birthday next week 🙂

  7. I’m no longer finding the recipe on the page. Am I just missing it? Or is it no longer there?
    I’m dying to try to make this cake!

  8. Hello! I made this yummy cake last year and went to make it again and I don’t see the recipe on this post. Can you share it with us again?

    Thanks so much!

  9. 5 stars
    Hello, I’ve made this cake before and loved it! I’m making it again but forgot to get cake flour and only have all purpose flour. Can I replace it with all purpose or will that change up the recipe too much? Thanks so much for sharing this recipe it is the best!

    1. While I prefer the real deal, you can certainly make your own if you’re in a pinch and can’t find pre-made. Here’s what you do:

      1 cup all-purpose flour – 2 tablespoons
      2 tablespoons corn starch
      1 cup cake flour

  10. 3 stars
    The cake wasn’t actually funfetti.. it was a plain white cake. The cereal crunch ingredients/recipe was also not included in the ingredient section but then mentioned below. I feel like this recipe had good potential but was confusing.

  11. I’m always confused when recipes call for milk powder because I feel like I end up with weird taste in the end from it. Do you use fat free or whole milk powder?

        1. I use 1% because that’s what I have on hand. If you use whole milk, you will probably need a tad more of it, as it’s thicker and will absorb the cereal a differently.

  12. I was so excited to try this cake! I just started the cereal crunch prep and the measurements are way off! 2.5 cups of Fruity Pebbles is not equal to 300g, it’s only 118g. I added more butter, still not clumping though. I hope the rest turns out well!

  13. is the cereal milk of 300g milk to 180g cereal correct? My cereal completely soaked up all of the milk after only 10 minutes and I hardly got 1/3-1/2 cup of milk out of it, nowhere close to the 1 cup needed.

  14. Is it typically better to follow the specified number of cups or the amount in grams of an ingredient? My cake flour for 3 cups would have been 384g according to the box (32g=1/4 cup), and the fruity pebbles box says 1 cup is 36g.

    1. I typically use cup measurements but also weigh my ingredients when I write recipes and add the grams based on my measurements.