Microwave version: Lightly grease a 13- x 9-inch or 9-inch square pan. Microwave butter in a 4 quart microwavable or casserole dish on high for 1 minute or until melted. Add sugar and milk; mix well. Microwave on high for 5 minutes or until mixture begins to boil, stirring after 3 minutes. Mix well and scrape the bowl. Microwave on high for 5-1/2 minutes, stirring after 3 minutes. Gradually stir in chocolate chips until melted. Add the remaining ingredients; mix well. Pour into prepared pan and cool at room temperature. Cut into squares. Makes 3 pounds.

Top-of-stove version: Prepare pan as directed. Mix margarine, sugar, and milk in a heavy 2-1/2 to 3 quart saucepan, bring to a boil on medium heat, stirring constantly. Boil 5 minutes or until candy thermometer reaches 234 degrees F, stirring constantly to prevent scorching. Remove from heat. Gradually stir in chocolate chips until melted. Add remaining ingredients and mix well. Pour into the prepared pan; cool at room temperature.