Whole Grain Blackberry Spice Muffins

Ingredients (14)

• 1 cup whole wheat flour
• 1 cup all purpose flour
• 1 cup quick-cooking oats
• 1 cup packed dark brown sugar
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 teaspoon allspice
• 1 cup nonfat milk
• 3 tablespoons butter,
• 1 teaspoon vanilla extract
• 1 large egg,
• 1½ cups frozen blackberries,
• 1 tablespoon granulated white sugar