Auntie Corine'S Wonderful Brownies
["1 c. butter", "4 sq. chocolate", "2 c. sugar", "4 eggs", "1 1/2 tsp. vanilla", "2 c. flour", "1/2 tsp. salt", "1 tsp. baking powder", "1 c. walnuts"]
["Melt butter and chocolate together; cool.", "Blend eggs, sugar and vanilla together.", "Add flour, salt and baking powder.", "Add chocolate mixture and walnuts.", "Bake on a large cookie sheet at 350\u00b0 for 20 minutes."]
["butter", "chocolate", "sugar", "eggs", "vanilla", "flour", "salt", "baking powder", "walnuts"]