Ingredients

• cooking spray
• 1 (18.25 ounce) package golden butter cake mix
• 1/2 cup margarine, melted
• 1 egg, beaten
• 2 cups miniature marshmallows
• 1/4 cup margarine
• 1/2 cup light corn syrup
• 1 (10 ounce) package peanut butter chips
• 2 cups salted peanuts
• 2 cups crispy rice cereal (such as Rice Krispies®)

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Instructions

1. Preheat oven to 350 degrees F (175 degrees C). Spray a 9x13-inch baking dish with cooking spray.
2. Mix cake mix, 1/2 cup melted margarine, and egg together in a bowl; press into the bottom of the prepared baking dish.
3. Bake in the preheated oven for 15 minutes. Top cake with marshmallows and return to oven until marshmallows melt, about 5 minutes.
4. Place 1/4 cup margarine in a large microwave-safe bowl; heat until melted, about 30 seconds. Stir corn syrup into melted margarine until smooth. Add peanut butter chips and heat in microwave until chips are melted, 30 seconds to 1 minute. Stir peanuts and rice cereal into mixture and spread on top of marshmallow layer on cake. Cool completely before cutting into bars.