Heavenly Brownies(Never Fail)  
["1 c. all-purpose flour", "1/2 tsp. baking powder", "2 oz. baking chocolate", "1 c. sugar", "2 eggs", "1 c. margarine", "1/2 c. chopped walnuts or pecans", "1 tsp. vanilla"]
["Sift flour and baking powder together.", "Melt chocolate and butter (or margarine) together in large saucepan.", "Blend in the sugar.", "Add eggs, one at a time, beating well after each.", "Stir in nuts, vanilla and dry ingredients.", "Spread in well-greased 8 or 9-inch square pan.", "Bake at 350\u00b0 for 25 to 30 minutes, just until mixture begins to pull away from sides of pan.", "Do not overbake. Cool completely before cutting into squares."]
["flour", "baking powder", "baking chocolate", "sugar", "eggs", "margarine", "walnuts", "vanilla"]