Save to Pinterest In about 10 minutes you can make a bright, cereal-infused buttercream that frosts 12 cupcakes (≈2 cups). Pulse 3/4 cup Fruity Pebbles until fine, beat softened butter with powdered sugar, then fold in crushed cereal, vanilla and milk until fluffy — add extra milk to loosen. Pipe or spread on cooled cakes and sprinkle reserved cereal. Swap plant-based butter and milk for dairy-free options; pairs well with vanilla or funfetti layers.
My niece turned seven last spring and requested a birthday cake that tasted like Saturday morning cartoons, so I blitzed Fruity Pebbles into buttercream and piped it onto vanilla cupcakes to everyone's delight.
When I brought these to a potluck, three adults asked if I had secretly added fruit puree, and one friend stood by the dessert table eating leftover frosting straight from the bowl with a spoon.
Ingredients
- Unsalted butter (1/2 cup, softened): Room temperature butter whips smoother and traps more air, so pull it out of the fridge an hour ahead.
- Powdered sugar (2 cups, sifted): Sifting prevents those annoying lumps that show up as white streaks in your finished frosting.
- Milk (2 to 3 tablespoons): Start with two tablespoons and add the third only if the frosting feels stiff, because humidity changes everything.
- Vanilla extract (1 teaspoon): A good quality extract rounds out the cereal flavor and keeps it from tasting one dimensional.
- Fruity Pebbles cereal (1 cup, divided): You will crush most of it and save some whole pieces for a crunchy, colorful garnish on top.
Instructions
- Crush the cereal:
- Pulse three quarters of a cup of Fruity Pebbles in a food processor or blender until fine, leaving the rest whole for topping later.
- Beat the butter:
- In a large mixing bowl, beat the softened butter with a hand mixer or stand mixer until it looks pale, creamy, and completely smooth.
- Add the sugar:
- Gradually pour in the sifted powdered sugar on low speed so it does not puff up into your face like a sweet cloud.
- Bring it together:
- Add the crushed cereal, vanilla extract, and two tablespoons of milk, then beat on medium high until everything is fluffy and the color turns a soft pastel rainbow.
- Adjust consistency:
- If the frosting feels too thick to spread easily, beat in one more tablespoon of milk until it reaches a silky, pipeable texture.
- Frost and garnish:
- Spread or pipe the frosting onto completely cooled treats, then scatter the reserved whole Fruity Pebbles over the top while the surface is still tacky.
Save to Pinterest Those rainbow flecked cupcakes disappeared in under ten minutes at the birthday party, and my niece now requests them every single year without fail.
Smart Swaps and Variations
Plant based butter and oat milk work beautifully here if you need a dairy free option, though the color may be slightly less vibrant.
Pairing Ideas
This frosting loves a plain vanilla or funfetti cake base because it lets the fruity cereal flavor shine without competing for attention.
Getting Ahead
You can make this frosting up to three days in advance and store it covered in the fridge.
- Let it come to room temperature for about thirty minutes before using.
- Give it a quick rewhip by hand or mixer to bring back the fluffiness.
- Taste before piping, because cold dulls flavors more than you might expect.
Save to Pinterest Sometimes the most memorable desserts come from the simplest ideas, and this frosting proves that a box of cereal holds more potential than breakfast alone.
Recipe Questions & Answers
- → How finely should the cereal be crushed?
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Pulse about 3/4 cup in a food processor or blender until it reaches a coarse-fine texture; you want tiny flakes to blend into the buttercream while keeping some crunch from the reserved whole cereal.
- → How do I get the right frosting consistency for piping?
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Start with 2 tablespoons of milk and beat until fluffy. If too stiff, add the remaining tablespoon. For firmer peaks chill briefly; for softer spreadable frosting add milk in 1/2 tablespoon increments.
- → Can I make this using dairy-free ingredients?
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Yes. Substitute plant-based butter and a neutral non-dairy milk (such as oat or almond) in the same amounts, then whip until creamy to achieve a similar texture and flavor profile.
- → How should I store leftovers?
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Keep frosting in an airtight container in the refrigerator for up to 5 days. Before using, bring to room temperature and rewhip briefly to restore lightness; adjust consistency with a splash of milk if needed.
- → What desserts pair best with this frosting?
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It complements vanilla, strawberry, or funfetti layers exceptionally well, and also works as a playful topper for cookies and cupcakes when you want a crunchy, colorful finish.
- → Are there allergen concerns I should note?
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This uses butter and Fruity Pebbles, which may contain milk, gluten, and soy. Check packaging for potential traces of nuts and choose allergen-friendly cereal or substitutes when necessary.
