Whole Grain Banana Muffins

Bahan-bahan (12 porsi)

• 1½ cups whole wheat flour
• 1 cup oats ((quick or old fashioned))
• ½ cup packed brown sugar
• 1 tablespoon baking powder
• ½ teaspoon baking soda
• 1 cup mashed ripe bananas ((about 3 medium))
• 5 tablespoons salted butter, (melted)
• ½ cup nonfat milk
• 2 large egg whites (or 1 large egg), (beaten)