Healthy Pumpkin Banana Muffins

Name: Healthy Pumpkin Banana Muffins
Ingredients: 1 1⁄2 cups all-purpose flour; 2 cups whole wheat flour; 2⁄3 cup rolled oats; 1⁄2 cup oat bran; 4 teaspoons baking powder; 2 teaspoons baking soda; 1⁄2 teaspoon salt; 4 teaspoons cinnamon; 2 teaspoons ground ginger; 1 teaspoon nutmeg; 3 ripe bananas, mashed; 1 cup applesauce; 15 ounces canned pumpkin; 4 eggs, lightly beaten; 1 cup granulated sugar; 1 cup packed brown sugar; 1 cup chopped walnuts