Banana Walnut Muffins

Ingredients (13)

• 2 cups all-purpose flour
• 11/2 teaspoons baking soda
• 1/2 teaspoon salt
• 1 teaspoon ground cinnamon
• 1 cup brown sugar
• 3/4 cup unsalted butter, room temperature
• 2 large eggs
• 1 teaspoon pure vanilla extract
• 1/2 cup sour cream, you can also use plain yogurt
• 3 overripe bananas
• 3/4 cup chopped walnuts
• 1/2 cup butter, melted
• raw cane sugar