Line a x9-inbaking pan with parchment paper, letting ends extend up sidesPrepare and bake brownie mix according to package directions, using prepared panCool brownies on a wire rack 30 minutesRefrigerate until cold.

Spread chunky peanut butter over browniesPlace chocolate chips and creamy peanut butter in a large microwave-safe bowlMicrowave in -second intervals until melted; stir until smoothStir in Rice Krispies; spread over chunky peanut butter layerRefrigerate, covered, at least 30 minutes or until set.

Lifting with parchment paper, remove brownies from panCut into barsStore in an airtight container in the refrigerator.