Hannah's Banana Bread

1/2 cup softened butter
1 cup sugar
2 eggs
1 1/2 cups flour
1 tsp salt
1 tsp baking soda
1 cup bananas
1/2 cup sour cream
2 tsp vanilla
nuts - optional

Cream butter, sugar and eggs.  Mix dry ingredients and combine with butter mixture.  Add bananas, sour cream and vanilla.  Pour into a greased bread pan and bake at 350 for 1 hour, or till toothpick comes out clean.