Brown Sugar Brown Butter Banana Bread: Ingredients: - 1/2 cup (1 stick) unsalted butter - 1 cup brown sugar, packed - 2 large eggs - 1 teaspoon vanilla extract - 1 1/2 cups mashed ripe bananas (about 3-4 bananas) - 1/4 cup sour cream or Greek yogurt - 1 3/4 cups all-purpose flour - 1 teaspoon baking soda - 1/2 teaspoon salt - 1/2 teaspoon ground cinnamon - 1/4 teaspoon ground nutmeg (optional) - 1/2 cup chopped walnuts or pecans (optional)