Banana-Bran Bread
["1 1/2 c. all-purpose flour", "2 tsp. baking powder", "1/2 tsp. baking soda", "1/2 tsp. salt", "1/4 c. butter or margarine", "1/2 c. sugar", "1 large egg", "1 tsp. vanilla extract", "4 small fully ripe bananas", "1 c. whole bran cereal", "1/2 c. chopped walnuts"]
["Preheat oven to 350\u00b0.", "Using solid vegetable shortening, thoroughly grease a 9 x 5 x 3-inch loaf pan; set aside."]
["flour", "baking powder", "baking soda", "salt", "butter", "sugar", "egg", "vanilla extract", "fully ripe bananas", "bran cereal", "walnuts"]