Peanut Butter Cups Marshmallow Brownie Bars
Layers of rich, fudgy brownie topped with pillowy marshmallow cream, halved peanut butter cups, and a crispy peanut butter–chocolate rice cereal topping—no complex technique, pure indulgence.
Prep Time 20 minutes mins
Cook Time 30 minutes mins
Chilling Time 1 hour hr
Total Time 1 hour hr 50 minutes mins
- Ingredients for boxed brownie mix typically including eggs, oil, and water
- 7 oz marshmallow creme
- 25 mini peanut butter cups halved
- 12 oz semi‑sweet chocolate chips
- 1 cup creamy peanut butter
- 3 cups crispy rice cereal
Bake the brownies according to the box directions in a 9×13 pan; cool completely, then chill for at least 1 hour.
Spread an even layer of marshmallow creme over the chilled brownies and chill another 30 minutes.
Arrange halved peanut butter cups evenly over the marshmallow layer.
In a microwave-safe bowl, combine chocolate chips and peanut butter; heat in 30-second bursts, stirring until smooth.
Stir in crispy rice cereal until coated; carefully spread this mixture over the peanut butter cups.
Chill for 1 hour before cutting into bars. Store in an airtight container in the refrigerator.
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For ultra-clean slices, chill long enough so the layers set firmly.
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Swap in dark chocolate for a richer contrast.
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Press the cereal mixture gently to adhere without breaking the layer.
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These bars hold well in the fridge—perfect for prepping in advance.