On stove, melt together 1 – 6oz package of chocolate chips and 1 – 6oz package butterscotch chips. Add ¼ cup peanut butter; stir constantly until well blended. Remove from heat. Add 4 cups Rice Krispies; stir until well coated. Drop by tablespoon onto waxed paper or buttered baking sheet. Let stand in cool place until firm. Mixture may also be pressed into a buttered 9×9 inch pan and cut into squares when firm.