01 -
In a large bowl, mix Rice Krispies cereal with grated graham crackers and half of the mini marshmallows.
02 -
Preheat the oven broiler. Spread half of the mini marshmallows on a greased, foil-lined baking sheet and broil 1 to 2 minutes until lightly toasted, watching closely to prevent burning. Remove and turn off the broiler, leaving the oven door closed to retain warmth.
03 -
Microwave the butter in a large bowl for 30 seconds until melted. Add large marshmallows and stir until fully melted and combined.
04 -
Add the toasted mini marshmallows and butter-marshmallow mixture to the cereal blend. Stir thoroughly to evenly coat.
05 -
Transfer the mixture into a greased 9x13 inch baking dish. Press lightly with a spatula to level the surface while preserving the chewy texture.
06 -
Sprinkle chocolate chips evenly over the cereal layer. Place in a warm oven until the chocolate begins to melt, then spread it out in an even layer.
07 -
Turn the broiler back on. Sprinkle the remaining mini marshmallows on top of the melted chocolate and broil for one minute or until lightly toasted, monitoring closely.
08 -
Remove from oven and arrange chocolate bar pieces over the top. Scatter the remaining graham cracker crumbs evenly before allowing to cool.
09 -
Let the bars cool completely before slicing into squares. Lightly spray a knife with nonstick spray for easier cutting.