Spray an 8-inch square metal baking pan with cooking spray. Line the pan with parchment paper and then spray the top of the parchment paper again. Set aside.

In a large skillet melt the butter over medium high heat and add the marshmallows and continue to stir until melted. Add the cocoa powder and whisk until smooth. Remove skillet from heat and add the rice krispies and 1/3 cup of the chocolate chips. Use a spatula to incorporate the mixture. Transfer the mixture into the prepare baking pan and spread out evenly. Sprinkle with the remaining chocolate chips. Let set for about 15 minutes until cool and then dig in!