1 1/2 c. sugar
1/2 c. butter
1 1/2 c. flour
2 eggs (whites beaten separately)
4 tbsp. sour milk
1 tsp. baking soda, dissolved in milk
3 bananas, mashed
1 tsp. vanilla

Mix all ingredients. Grease and flour square cake pan. Bake in 350 degree oven for 40 to 45 minutes.