Put chocolate chips in a heat proof bowl set aside. Place container of frosting in microwave and on med setting heat frosting for 20-30 seconds until it is melted. Pour over chocolate chips and let sit until chips are melted. Add nuts and maple flavoring and gently stir until well blended. Pour in 8x8 inch pan. Sprinkle with more chopped walnuts if desired. Let candy cool cut in 1 inch squares and enjoy!!