Place corn syrup and sugar into 3-quart saucepan. Cook over medium heat, stirring frequently, until sugar dissolves and mixture begins to boil. Remove from heat. Stir in peanut butter. Mix well. Add KELLOGG'S® RICE KRISPIES® cereal. Stir until well coated. Press mixture into 13 x 9 x 2-inch pan coated with cooking spray. Set aside.
Melt chocolate and butterscotch chips together in 1-quart saucepan over low heat, stirring constantly. Spread evenly over cereal mixture. Let stand until firm. Cut into 2 x 1-inch bars when cool.