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A close-up of a vanilla cupcake topped with a swirl of creamy, fruity pebbles-infused frosting, hinting at a delightful, sweet treat.

Fruity Pebbles Buttercream Frosting

Sarah Allison
This Fruity Pebbles buttercream frosting packs a rainbow of flavors in every dollop! It tastes delicious atop vanilla or chocolate cupcakes, and of course, these Fruity Pebbles cupcakes.
5 from 1 vote
Prep Time 25 minutes
Cook Time 5 minutes
Total Time 30 minutes
Course Dessert
Cuisine American
Servings 18

Equipment

Ingredients
  

Cereal Milk

  • 1 cup (36 g) Fruity Pebbles cereal
  • 1 cup (250 ml) whole milk

Fruity Pebbles Buttercream

  • 2 tablespoons Fruity Pebbles cereal crushed
  • 1 cup (226 g) unsalted butter room temperature
  • 4 1/2 cups (552 g) cups confectioner's sugar
  • 1/4 cup cereal milk
  • 2 teaspoons pure vanilla extract
  • 1/4 teaspoon (1g) Diamond Crystal kosher salt; for table salt, use about half as much by volume or the same weight

Instructions
 

Cereal Milk

  • Combine the Fruity Pebbles and milk in a medium-sized bowl and let it soak for a least 20 minutes.
  • Pour the milk/cereal mixture into a sieve set over a medium-sized bowl or large measuring cup, and press on the cereal left in the sieve with the back of a spoon to get as much of the cereal milk out as possible.
  • Measure out 1/4 cup of the cereal milk for the frosting. Set aside.

Fruity Pebbles Buttercream

  • Grind the 2 Tablespoons of fruity pebbles into fine crumbs (I use my small food processor). Set aside
  • With a handheld or a stand mixer fitted with a paddle attachment, beat the butter at medium speed until creamy, for about 2 minutes.
  • Slowly mix in the confectioners' sugar, cereal milk, vanilla extract, and salt on low for about 30 seconds, then kick it up to medium-high and whip for another 2 minutes.
  • Now's the time to tweak the thickness: if it's looking too thin, gradually add more sugar. Too thick? Loosen it up with a bit more milk, just a tablespoon at a time.
  • You're ready to frost now or if you're prepping ahead, seal it up tight and keep it in the fridge for up to a week or freeze for up to 3 months.

Notes

If the buttercream has been chilled or frozen, a quick beat in the mixer on medium should bring back that creamy goodness. if it's a tad stiff, thin it with milk or cream to get the consistency just right.
This recipe is enough to frost 18 cupcakes or a thin layer on a 9×13 inch quarter sheet cake.
 

Nutrition

Calories: 234kcalCarbohydrates: 34gProtein: 1gFat: 11gSaturated Fat: 7gPolyunsaturated Fat: 0.4gMonounsaturated Fat: 3gTrans Fat: 0.4gCholesterol: 29mgSodium: 61mgPotassium: 32mgFiber: 0.03gSugar: 32gVitamin A: 439IUVitamin C: 1mgCalcium: 25mgIron: 0.3mg
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