Congo Bars
["1 1/2 sticks margarine", "1 box brown sugar", "3 eggs", "2 3/4 c. self-rising flour", "1 tsp. vanilla", "1 (6 oz.) bag chocolate chips", "1 c. chopped nuts"]
["Melt margarine in a 9 x 13-inch pan at 375\u00b0.", "Pour butter in a bowl.", "Add remaining ingredients.", "Bake at 375\u00b0 for 25 to 30 minutes, until brown.", "Let cool; cut into squares."]
["margarine", "brown sugar", "eggs", "flour", "vanilla", "chocolate chips", "nuts"]