Mix and bake brownies according to package directions. When brownies are done, sprinkle marshmallows over top and return to oven for 3 minutes. Remove from oven and spread marshmallows over brownies using knife dipped in cold water; cool. For topping, melt butter, chocolate chips and peanut butter in sauce pan. Stir in Rice Krispies. Spread topping over cooled marshmallows. Let stand until cooled and topping has set. |