3/4 cup butter
3 cups white sugar
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)
Preheat oven to 300 degrees F (150 degrees C). Grease four 7x3 inch loaf pans. In a small bowl, stir together 1/4 cup white sugar and 1 teaspoon cinnamon. Dust pans lightly with cinnamon and sugar mixture.
In a large bowl, cream butter and 3 cups sugar. Mix in eggs, mashed bananas, sour cream, vanilla and cinnamon. Mix in salt, baking soda and flour. Stir in nuts. Divide into prepared pans.