Black Walnut Pound Cake
["1 c. butter, softened", "1/2 c. shortening", "3 c. sugar", "5 eggs", "3 c. all-purpose flour", "1/2 tsp. baking powder", "1 c. milk", "1/2 tsp. vanilla", "1/2 c. chopped walnuts"]
["Beat butter and shortening until soft and creamy.", "Gradually add sugar and beat 5 to 7 minutes.", "Add eggs, one at a time, beating until yellow disappears."]
["butter", "shortening", "sugar", "eggs", "all-purpose", "baking powder", "milk", "vanilla", "walnuts"]