Congo Squares
["1 box light brown sugar", "1 1/2 sticks margarine", "3 eggs", "2 3/4 c. self-rising flour", "1 (6 oz.) bag chocolate chips", "1 c. nuts (optional)", "1 tsp. vanilla"]
["Cream together sugar and margarine.", "Add eggs.", "Beat.", "Add flour.", "Stir in vanilla, chips and nuts.", "Bake at 325\u00b0 for 35 to 40 minutes."]
["light brown sugar", "margarine", "eggs", "flour", "chocolate chips", "nuts", "vanilla"]