Oven at 350 degrees. Serves 10 to 12. Use 9 x 13 x 2 inch pan. Do ahead.

1/2 c. butter
1 1/3 c. sugar
2 eggs
1 tsp. vanilla
2 c. flour
1 tsp. baking powder
1 tsp. baking soda
3/4 tsp. salt
1 c. sour cream
1/4 c. walnuts, chopped
2 lg. bananas, mashed

Preheat oven. Grease pan. Soften butter in bowl, add sugar and beat well. Then add eggs one at a time. Beat after each. Stir in vanilla. Sift flour with baking powder, soda and salt. Add slowly to egg mixture, alternately with sour cream. Stir in bananas and walnuts. Bake for 30 to 35 minutes. Dust with confectioners' sugar or ice with a buttercream frosting.