Easy Apple Cinnamon Muffins

Bahan-bahan (12 porsi)

• 1 cup all purpose flour
• ½ cup whole wheat flour
• ½ cup granulated white sugar
• ½ cup packed brown sugar
• 2 teaspoons baking powder
• 2 teaspoons ground cinnamon
• ½ teaspoon salt
• ⅓ cup vegetable or canola oil
• 1 large egg
• ⅓ cup milk
• 2 medium apples ((peeled, cored & chopped))
• ¼ cup granulated white sugar
• 2 tablespoons all purpose flour
• 2 tablespoons butter, (at room temperature)
• 1 teaspoon ground cinnamon