Banana Cake

1/4 cup butter-melted
1 1/3 cup sugar
2 eggs
1 tsp vanilla
2 cups flour
1 tsp baking powder
1 tsp baking soda
 3/4 tsp salt
1 cup sour cream
1 cup bananas mashed
1/2 cup chopped nuts

Cream together melted butter, eggs, and sugar. Add sour cream, mashed bananas and remaining ingredients. Bake 35 minutes at 350 degrees.
Frosting:
1/2 banana
1 tbsp sour cream
powdered sugar
butter