Banana Fudge Walnut Brownies
["1/4 c. butter", "6 oz. semi-sweet chocolate chips", "3/4 c. flour", "1/2 c. sugar", "1/3 c. chopped walnuts", "1/3 c. mashed ripe bananas", "1/2 tsp. vanilla", "1/4 tsp. baking powder", "1/4 tsp. salt", "1 egg"]
["Heat oven to 350\u00b0.", "Grease bottom only of 8-inch square pan. Melt in 2-quart saucepan over low heat, stirring constantly, the butter and chocolate chips. Beat in thoroughly with spoon the flour, sugar, walnuts, banana, vanilla, baking powder, salt and egg. Spread batter evenly in pan. Bake about 30 minutes or until center is set."]
["butter", "semi-sweet chocolate chips", "flour", "sugar", "walnuts", "mashed ripe bananas", "vanilla", "baking powder", "salt", "egg"]