Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
                        ----Batter----
   2      c             unbleached flour
   1 3/4  c             brown sugar -- packed
   4      tsps          cinnamon
   1      tsp           baking powder
     1/2  tsp           baking soda
     1/4  tsp           salt
     3/4  c             margarine -- softened
   2      tsps          vanilla
   3                    egg whites -- whipped
   2      c             apples -- peeled and sliced
                        ----Topping----
   1 1/2  c             powdered sugar -- sifted
     1/4  c             margarine -- melted
     1/4  c             brown sugar -- packed
   1      tsp           vanilla
   4      tsps          skim milk

Preparation:

Preheat oven at 350. Prepare a 12-cup Bundt Pan with cooking spray and flour. To prepare batter, combine flour, 1 3/4 cup brown sugar, cinnamon, baking powder, baking soda, and salt in a mixing bowl. In another mixing bowl, combine 3/4 cup margarine, 2 teaspoons vanilla, egg whites, and apples. Mix dry ingredients with wet ingredients just until moistened. Pour batter into prepared pan. Bake for 45 minutes. Then cool upright for 30 minutes; invert onto serving plate. Meanwhile, to prepare topping, combine powdered sugar, remaining margarine, brown sugar, remaining vanilla, and milk. Immediately spoon over cooled cake.