01 - Place 3/4 cup of Fruity Pebbles cereal in a food processor or blender and pulse until finely crushed. Reserve the remaining 1/4 cup for garnish.
02 - In a large mixing bowl, beat the softened butter with a hand mixer or stand mixer on medium speed until creamy and smooth.
03 - Gradually add the sifted powdered sugar, mixing on low speed until fully combined and no dry pockets remain.
04 - Add the crushed Fruity Pebbles, vanilla extract, and 2 tablespoons of milk. Beat on medium-high speed until light, fluffy, and fully blended. If the frosting is too thick, add the remaining tablespoon of milk one small splash at a time until the desired consistency is reached.
05 - Spread or pipe the frosting onto fully cooled cupcakes, cookies, or cake layers.
06 - Sprinkle the reserved whole Fruity Pebbles over the frosted surfaces for a bright, colorful finish.