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5 from 1 vote

Frosted Flakes Marshmallow Treats

These Frosted Flakes Marshmallow Treats are a fun twist on a classic cereal bar, made with brown butter, vanilla, and gooey marshmallows for extra flavor. Flaky, crispy, and sweet with a drizzle of white chocolate on top, they’re perfect for parties or quick weeknight desserts. They come together in just 20 minutes and are always a crowd favorite!
Prep Time5 minutes
Cook Time5 minutes
Servings: 16 treats
Author: Emily - My Messy Kitchen

Ingredients

  • 1 cup salted butter
  • 2 10 oz bags of mini marshmallows
  • 2 tsp vanilla extract
  • ½ tsp kosher salt
  • 11 cups frosted flakes
  • 1 4oz white chocolate baking bar or ½ cup white chocolate chips

Instructions

  • Line a 9×13 pan with parchment paper. Lightly mist with nonstick cooking spray and set aside. In a large pot melt the butter. Once melted, continually stir until the butter just begins to brown. The butter should foam up twice and then begin to give off almost a nutty aroma. Immediately remove from heat so the butter does not burn.
  • Immediately stir in the vanilla extract. The hot mixture will bubble up, so continue to stir an additional thirty seconds until the sizzling subsides.
  • Add in one bag or half of your marshmallows and mix until almost completely melted before adding the remaining. Stir until all of the marshmallows are entirely combined and melted.
  • At this point add in the Frosted Flakes 2 cups at a time, and using a rubber spatula lightly stir until combined. Before mixing, run the spatula with water or spray with nonstick cookie spray. Continue to add the Frosted Flakes until everything is evenly combined. Pour into prepared pan. Lightly wet your hands and gently push into the pan to the edges. You don't want to crush it, so be gentle but firm enough to press it into the pan. Let set up for at least 20 minutes.
  • Add 4 ounces (1 baking bar) of white chocolate to a heat proof bowl. Microwave for 15 second intervals, stirring with a clean metal spoon in between, and repeat until completely melted. Once it's ready, set aside for 5 minutes to chill down to room temperature. Using a spoon, drizzle the chocolate onto the treats. Cut & enjoy!