Basic ingredients plus butter
Prepare brownies according to package instructions and remove from oven.
As brownies start cooling, melt 1 and 1/4 cup peanut butter, 3 tbs butter, 11.5 oz bag of chocolate chips in a sauce pan over medium heat. Once melted, stir in 2 cups rice crispies.
Spread warm rice crispie mixture over warm brownies.
Allow to cool enough so that the topping is firm. I love this treat served warm, but you can place it in the refrigerator to fully harden.