1.Preheat oven to 425 degrees. Spray all 12 cups on your muffin tin with non-stick cooking spray.
2.In a large mixing bowl, combine the flour, baking powder, cinnamon, baking soda and salt. Blend well with a whisk. Add the grated apple and chopped apple. Stir to combine.
3.In a medium mixing bowl, combine the oil and maple syrup and beat together with a whisk. Add the eggs and beat well, then add the yogurt, applesauce and vanilla and mix well. Pour the wet ingredients into the dry and mix with a big spoon, just until combined (a few lumps are ok). The batter will be thick.
4.Divide the batter evenly between the 12 muffin cups. Sprinkle the tops of the muffins with turbinado sugar. Bake muffins for 13 to 16 minutes, or until the muffins are golden on top and a toothpick inserted into a muffin comes out clean.
5.Place the muffins on a cooling rack to cool. Serve immediately.