Pre heat oven to 350 degrees and grease three 6 inch cake pans.
In a medium bowl, add the diced apples, 1 tbsp brown sugar and 1 tsp cinnamon. Mix together and set aside.
In another medium bowl, combine the remaining cinnamon, flour, baking powder, nutmeg, and salt and set aside.
In a stand mixer fitted with the paddle attachment, beat the applesauce, remaining brown sugar and granulated sugar until well combined.
Add the eggs and vanilla and mix until combined.
With the mixer on low speed, add the dry ingredients in three installments and mix until just combined.
Fold in the spiced apples.
Divide the batter evenly between the three prepared pans and bake for 45-50 minutes or until a toothpick comes out with just a few crumbs.