Banana Cake
["2 c. flour", "1 tsp. baking powder", "1 tsp. baking soda", "1/2 c. butter", "1 1/2 c. sugar", "1 egg plus 1 egg yolk", "1 c. mashed bananas", "1/2 c. buttermilk", "1 tsp. vanilla", "1 c. chopped nuts"]
["Cream together butter and sugar. Add eggs and mashed bananas; mix well. Mix dry ingredients. Alternate dry ingredients and milk to creamy mixture. Mix well and fold in nuts. Pour into 2 well buttered 9-inch pans and bake at 350\u00b0 for 30 minutes or until done."]
["flour", "baking powder", "baking soda", "butter", "sugar", "egg", "bananas", "buttermilk", "vanilla", "nuts"]