2 1/4 c. cake flour
1/2 tsp. baking powder
3/4 tsp. baking soda
1/2 tsp. salt
1/2 c. butter
1 1/2 c. sifted sugar
2 eggs
1 c. lightly mashed banana
1 tsp. vanilla
1/4 c. yogurt or buttermilk

Resift flour with baking powder, soda and salt. Set aside. Cream butter. Add sugar, set aside. Beat eggs, 1 at a time. Add banana, vanilla and yogurt or buttermilk. Alternately add banana mixture and butter mixture to flour mixture. Beat until smooth. Bake in preheated oven at 350 degrees for 1/2 hour. When cool, frost with Creamy White Frosting.