In a large sauce pan over high heat stir together corn syrup and sugar until it starts to slightly boil.Add the peanut butter and stir until smooth.Add the marshmallows and stir until no longer lumpy.Add the Rice Krispies Cereal and gently stir until coated.Turn out into a greased 9×13? casserole dish. Spread out with a spoon.Melt the chocolate and butterscotch morsels together in a microwave safe bowl. Cook for 1 minute, stir, and cook an additional 30 seconds until smooth, stirring in between.Pour over Rice Krispie Treats and smooth out with the back of a spoon.Let the chocolate cool till it is set.Cut into squares and enjoy!!