Microwave: In 4-quart, microwave-safe bowl, microwave margarine on High (full- power) 1 minute or until welted. Add sugar and milk; mix well. Microwave on High 5 minutes or until begins to boil, stirring after 3 minutes. Mix well; scrape bowl. Continue microwaving 5-1/2 minutes; stir after 3 minutes. Stir in chips until melted. Add remaining ingredients; mix well.
Pour into greased 9-inch square pan or 13x9-inch baking pan. Cool at room temperature; cut into squares. Makes 3 pounds.