You don't need a campfire to enjoy all of the s'mores goodness packed into these Peanut Butter S'mores Bars. Your whole family will love these chewy marshmallow treats.
Line a 9x13 inch cake pan with parchment paper. Set aside. (Note 1)
Add the cereal to large zipper top bag and crush into smaller pieces. Set aside.
In a Dutch oven set over medium-low heat, add the butter and peanut butter. Stir until melted. Add 16 ounces of marshmallows and stir until melted and the mixture is smooth.
Add the cereal and stir to coat with the marshmallow mixture. Quickly fold in the chocolate chips and remaining 1 cup of marshmallows. Transfer the mixture to the prepared pan and spread into an even layer. (Note 2)
Melt the bittersweet chocolate in a double-boiler or microwave. (Note 3) Pour over the marshmallow mixture and spread evenly. Top with extra crushed cereal. Allow to set at room temperature.
Slice into 24 squares and enjoy! Store the bars in an airtight container at room temperature.
Notes
Spray the pan with cooking spray first helps to hold the parchment in place when spreading the sticky mixture.
Spray your fingers with cooking spray before pressing the mixture into the pan.
To melt chocolate: Double-boiler: Place a glass bowl over a saucepan of simmering water. Be sure the bottom of the bowl does not touch the water. Add the chopped chocolate and stir until completely melted. Microwave: Add the chopped chocolate to a glass bowl. Heat on high for 20-30 second intervals, stirring after each, until the chocolate is completely melted and smooth.