Birthday Cake Crispy Rice Treats

Birthday cake goes crunchy! Tuck your favorite cereal treats into a cake pan, top with marshmallow frosting, add birthday candles and celebrate.
  • Level: Easy
  • Total: 1 hr 5 min (includes resting time)
  • Active: 35 min
  • Yield: 8 to 10 servings
Save Recipe



4 tablespoons unsalted butter, plus more for greasing pan

One 10-ounce bag mini marshmallows

2 teaspoons pure vanilla extract

Kosher salt

6 cups crispy white cereal

1/3 cup multicolored sprinkles, plus more for decorating


2 cups mini marshmallows

4 tablespoons unsalted butter, at room temperature 

1/2 cup confectioners' sugar

Butter a 9-inch round cake pan.


  1. For the "cake": Melt the butter in a large pot over medium heat. Add the marshmallows, and cook, stirring occasionally, until they melt completely, about 5 minutes. Remove the pot from the heat, and stir in the vanilla and a pinch of salt. Add the cereal and sprinkles, and stir with a rubber spatula, scraping up from the bottom, until the cereal is completely coated. Transfer the cereal to the prepared cake pan, and pat it down into an even layer. Let sit at room temperature until firm, about 30 minutes. Invert onto a serving plate.
  2. For the frosting: Heat the marshmallows and butter in small saucepan over medium-low heat, stirring constantly, until completely melted. Remove the saucepan from the heat, and stir in the confectioners' sugar.
  3. Spread the frosting over the top of the "cake" in an even layer. Decorate with sprinkles. Cut into wedges, and serve. (The frosted "cake" can be stored in an airtight container at room temperature for up to 3 days.)
Get the Recipe

Perfect Cranberry Sauce

This ruby-hued sauce is a breeze to make with either fresh or frozen fruit.

Extra-Marshmallow Crispy Rice Treats

Peanut Butter Crispy Rice Treats

Brain-Boosting Rice Crispy Treats

Marshmallow Crispy Treats

Kids Can Make: Football Cocoa-Crispy Rice Treats

Crispy-Treat Cheesecake Bars

Rice Krispies Treat Coals

Brownie "Ribs" and Crispy Rice Treat "Corn-on-the-Cob" with Drunk Cherry BBQ Sauce