In microwave-safe bowl heat butter and Chocolate Brownie marshmallows on HIGH for 3 minutes, stirring after 2 minutes. Stir until smooth. Remove from microwave and stir in 5 cups of Cocoa Krispies. Once well combined, add in chopped up brownies. Stir until just combined. Press into a pan that has been lined with wax or parchment paper, or even foil, and lightly sprayed with non-stick cooking spray. Allow to cool then cut into shapes with cookie cutters or a knife. If desired, drizzle melted chocolate coating on top for garnish. Makes approximately 12 2.5" Rice Krispies Treats. Enjoy.