Heat oven to 350 degrees.
Cream and the butter and the sugar until light and fluffy.
Add the eggs one at a time, beating well after each addition.
Stir in the bananas and sour cream.
In a separate bowl, combine the dry ingredients.
Slowly add the dry ingredients to the wet ingredients just until moistened.
Fold in the nuts or chocolate chips if using any.
Pour batter into a well-greased glass bread pan.
Bake at 350 degrees for 1 hour or until inserted toothpick comes out clean.