Brown Butter Banana Bread (Moist, Rich & Irresistible)

Ingredients

• 1/2 cup unsalted butter (1 stick)
• 4 large or 5 medium bananas, very ripe
• 1 cup brown sugar, packed
• 2 large eggs
• 1/3 cup sour cream*
• 1 Tablespoon vanilla extract
• 2 1/4 cups all-purpose flour
• 1 teaspoon salt
• 1 teaspoon baking soda
• 1 cup chocolate chunks or chocolate chips
• 1 cup chopped walnuts (optional)
• 2 Tablespoons turbinado sugar