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Red, White, and Blue Marshmallow Bars

Red, white, and blue marshmallow bars with a buttery Rice Krispies-style base and no-bake folding method for soft, chewy texture. Loaded with mini marshmallows and optionally finished with sprinkles and a white chocolate drizzle for a festive patriotic look.
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Prep Time 10 minutes
Cook Time 5 minutes
cooling 30 minutes
Total Time 45 minutes
Servings: 12 servings
Course: Dessert
Cuisine: American
Calories: 210
Ingredients Equipment Method Notes

Ingredients
  

Base
  • 6 tbsp unsalted butter
  • 1 can (10 oz) white mini marshmallows 10 oz bag
  • 6 cup Rice Krispies cereal
Mix-ins & Topping
  • 1.5 cup red mini marshmallows
  • 1.5 cup blue mini marshmallows
  • 1.5 cup white mini marshmallows
  • 1 tsp vanilla extract
  • 0.25 tsp salt
  • 1 Red, white, and blue sprinkles optional topping
  • 2 tbsp white chocolate chips for drizzle; optional

Equipment

  • 1 sheet pan

Method
 

Prep the pan
  1. Grease a 9×13-inch baking pan generously with butter or non-stick spray and set aside.
Melt marshmallows and build the base
  1. In a large saucepan over medium-low heat, melt the butter until fully liquid and just starting to foam.
  2. Add the bag of white mini marshmallows and stir constantly until fully melted and smooth, about 3–4 minutes.
  3. Remove from heat immediately, then stir in the vanilla extract and salt.
  4. Working quickly, fold in the Rice Krispies cereal using a rubber spatula until every piece is evenly coated in the marshmallow mixture.
Fold in colors and assemble
  1. Add the red, white, and blue mini marshmallows and fold gently so their colors stay distinct and vibrant.
  2. Transfer the mixture into the prepared pan and press gently into an even layer without pressing too hard.
  3. If using, scatter sprinkles over the top immediately while the surface is still tacky, then drizzle with melted white chocolate.
Cool and slice
  1. Let the bars cool at room temperature for at least 30 minutes before cutting into squares or rectangles.
  2. Slice and serve.
  3. Store covered at room temperature for up to 3 days.

Notes

Pro tip: fold the colored mini marshmallows in gently—keeping them from fully melting helps the red, white, and blue stay bright. Store covered at room temperature up to 3 days; freezing is not recommended for best chewy texture. For a dairy-free swap, use plant-based butter and dairy-free white chocolate chips if you’re adding the drizzle.