Line a 13x9-in. baking pan with parchment, letting ends extend up sides. Prepare and bake brownie mix according to package directions, using prepared pan. Cool in pan on a wire rack 30 minutes. Refrigerate until cold., Spread chunky peanut butter over brownies. Place chocolate chips and creamy peanut butter in a large microwave-safe bowl. Microwave in 30-second intervals until melted; stir until smooth. Stir in Rice Krispies; spread over chunky peanut butter layer. Refrigerate, covered, at least 30 minutes or until set., Lifting with parchment, remove brownies from pan. Cut into bars. Store in an airtight container in the refrigerator.