Cinnamon Walnut Banana Muffins

Ingredients (15)

• 1/2 cup unsalted butter, melted
• 1/2 cup brown sugar
• 1/2 cup white sugar
• 1/2 cup sour cream
• 2 eggs
• 1 teaspoon vanilla
• 3 very ripe large bananas
• 1 cup all purpose flour
• 1/2 cup white whole wheat flour (can sub with all purpose flour)
• 1 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 1 teaspoon cinnamon
• 3/4 cup mini cinnamon chips
• 1 cup chopped walnuts