Double Chocolate Fudge Brownies
["2 3/4 sticks margarine", "1 (1 lb.) box brown sugar", "1 tsp. vanilla", "3 c. flour", "1 tsp. baking powder", "1 c. chopped walnuts", "3 eggs", "1 (12 to 16 oz.) pkg. chocolate chips", "1/2 c. margarine", "1/2 c. cocoa", "1/4 c. milk", "4 3/4 c. confectioners sugar", "1 tsp. vanilla", "1/2 c. walnuts, chopped"]
["Combine margarine, cocoa and milk in a saucepan.", "Heat until bubbles form, stirring occasionally.", "Remove from heat.", "Add confectioners sugar, vanilla and nuts.", "Beat until spreadable. You may have to add 1 or 2 more tablespoons of milk to make spreadable."]
["margarine", "brown sugar", "vanilla", "flour", "baking powder", "walnuts", "eggs", "chocolate chips", "margarine", "cocoa", "milk", "confectioners sugar", "vanilla", "walnuts"]