PREHEAT oven to 350° F. Grease a 13 x 9-inch baking pan.
COMBINE flour, baking soda and salt in small bowl. Microwave sugar, butter and water in a large, microwave-safe bowl on HIGH (100%) power for 3 minutes or until mixture boils, stirring once. Add broken baking bars; stir until melted. Add eggs, one at a time, stirring after each addition until well blended. Stir in vanilla extract. Add flour mixture; stir well. Stir in nuts. Pour into prepared baking pan.
BAKE for 16 to 20 minutes or until wooden pick inserted in center comes out still slightly sticky. Cool in pan on wire rack. Cut into bars.
FOR SAUCEPAN METHOD:
HEAT sugar, butter and water in medium saucepan just to a boil, stirring constantly. Remove from heat. Proceed as above.