Pear-Walnut Muffins

Ingredients

• 1 1/2 cups all-purpose flour
• 2/3 cup firmly packed brown sugar
• 1/2 cup whole-wheat flour or all-purpose flour
• 1 tablespoon baking powder
• 1/2 teaspoon salt
• 1/2 teaspoon ground cinnamon
• 1 1/4 cups finely chopped pear
• 1/3 cup coarsely chopped walnuts, toasted
• 3/4 cup 2% low-fat milk
• 2 tablespoons vegetable oil
• 1 large egg, lightly beaten
• Cooking spray
• 1 tablespoon granulated sugar