Spray a 9x9 baking tin with non-stick baking spray and set aside.

In a large heavy bottom pan, melt the butter over medium heat.

Add the 10 ounces of mini marshmallows and stir to combine. Continue to stir until fully melted, and then add in the pulverized graham crackers and incorporate into the marshmallows.

Add the rice krispie cereal and stir to combine. Once combined, transfer the mixture to the prepared baking sheet and sprinkle the mini chocolate chips on top. Cover the top with the additional marshmallows and let set for at least 30 minutes.

Using a blow torch, or the broiled in your oven, torch the top of the final marshmallow layer for 15 second increments until the marshmallows are toasted. Cut and serve as needed.