Preheat oven to 350 degrees. Spray a 9x5 inch loaf pan with non-stick baking spray.In a bowl, place the eggs and egg whites, beat with a mixer for about a minute.To that bowl, add the turbinado sugar and blend for about 2 minutes, until sugar is well blended. Then add the applesauce and vanilla and blend for another minute, mixture will be well blended.In a seperate bowl, sift together the whole wheat flour, white flour, cocoa powder, salt, baking soda, cinnamon, and baking powder.Add the dry ingredients into the wet egg ingredients. Gently fold to combine. Add in the shredded zucchini and chocolate chips to combine the ingredients.Spoon the batter into the greased loaf pan. Place in the preheated oven for about an hour. Begin to check it at 50 minutes by sticking the center of the loaf with a toothpick. The toothpick should be almost clean when it comes out of the loaf. Let it set in the loaf pan for about 10 minutes. Then remove from loaf pan and place on wire rack to cool completely!