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

Cream sugar and butter, add egg yolks mix and add bananas. Sift dry ingredients, add alternating with sour cream. Mix well. Add vanilla, stiffly beaten egg whites and nuts. Pour into 9 x 13 inch pan. Bake at 350 degrees for 1 hour. Cut into bars when cool.