Banana Sour Cream Bread

INGREDIENTS:

1/4 cup white sugar
1 teaspoon ground cinnamon
3/4 cup butter
3 cups white sugar
3 eggs
6 very ripe bananas, mashed
1 (16 ounce) container sour cream
2 teaspoons vanilla extract
2 teaspoons ground cinnamon
1/2 teaspoon salt
3 teaspoons baking soda
4 1/2 cups all-purpose flour
1 cup chopped walnuts (optional)