Cinnamon-Apple Waffles

Ingredients

• 1 cup all-purpose flour
• 2/3 cup whole wheat flour
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 2 tablespoons sugar
• 2 tablespoons brown sugar
• 1 1/2 teaspoons ground cinnamon
• 1 2/3 cups low-fat buttermilk
• 1 tablespoon vegetable oil
• 1/2 teaspoon vanilla extract
• 3/4 cup peeled, finely chopped apple
• 2 egg whites
• 1/8 teaspoon cream of tartar
• Vegetable cooking spray