Mix Sugar and Karo Syrup together in Medium Sauce pan and heat to bubbling stirring frequently, turn off heat and add peanut butter and stir till mixed. Pour over Rice Krispies mix and then put into a buttered 13 x 9 pan and press down to fit pan.   In double boiler melt morsels together and then pour over top of rice krispies and spread across top. Put in freezer only until the chocolate no longer looks wet. Remove and cut into squares.