Cake Brownies
["1/4 c. butter or margarine", "1 c. sugar", "2 egg yolks", "1/4 c. milk", "1/2 tsp. vanilla", "2 (1 oz.) sq. unsweetened melted chocolate or 1/2 c. cocoa", "2/3 c. flour", "1/2 tsp. baking powder", "1/2 tsp. salt", "1/3 c. nuts", "2 stiffly beaten egg whites"]
["Mix all dry ingredients in bowl.", "Mix sugar, egg yolks, butter, milk and vanilla, then add chocolate, dry ingredients and nuts, then add beaten egg whites.", "Bake at 350\u00b0 for 15 to 18 minutes.", "Bake in a 9 x 9-inch greased pan."]
["butter", "sugar", "egg yolks", "milk", "vanilla", "chocolate", "flour", "baking powder", "salt", "nuts", "egg whites"]