Preheat oven to 375. Line 15x10 or 9x13 cookie sheet (this would be a medium size) with parchment paper.
In mixing bowl, mix the eggs, sour cream, sugar and applesauce together.
In a separate bowl whisk together flour, baking powder and cinnamon.
Slowly add to mixing bowl on medium till all incorporated.
Pour into prepared cookie sheet, spread out and bake for 15 minutes.
Take a dish towel that is the size of the cake. Cover with ½ cup powdered sugar.
When cake is done and cooled for about 2 minutes. Remove from pan lay cake onto the dish towel. Starting at one end, roll the cake into the dish towel.
Place in refrigerator to cool for an hour.
FOR THE APPLE FILLING:
On medium heat, using a medium size pot melt your butter.
Add brown sugar and stir till the sugar has dissolved.
Add cinnamon and apples.
Let the mixture simmer for 15 minutes or until apples are soft.
Drain and set aside.
FOR THE ICING FILLING:
Prepare filling by mixing butter and cream cheese together. Add powdered sugar and milk.
When ready, take roll out of refrigerator, unroll. Spread icing onto cake.
Top with half the apple filling. Roll the cake back up without the dish towel, in plastic wrap and refrigerator for 1 hour or until ready to serve.
When ready to serve top with remaining apple filling. Sprinkle with powdered sugar and ENJOY!