Brownies(Fudgy)  
["1/2 c. butter", "2 (1 oz.) sq. unsweetened chocolate", "1 c. sugar", "2 eggs", "1 tsp. vanilla", "3/4 c. all-purpose flour (use cake flour if you want chewy)", "1/2 c. chopped walnuts (if desired)", "1/2 tsp. baking powder"]
["Melt butter and chocolate over very low heat.", "Remove from heat; stir in sugar.", "Blend in eggs one at a time.", "Add vanilla. Stir in flour, baking powder and nuts.", "Mix well.", "Spread in greased 8 x 8 x 2-inch greased baking dish and bake at 350\u00b0 for 30 minutes.", "Yield:", "16 squares.", "(Do not overbake.)"]
["butter", "unsweetened chocolate", "sugar", "eggs", "vanilla", "all-purpose flour", "walnuts", "baking powder"]