Family Tested & Approved
Preheat oven to 350. Mix cake mix, oats, butter and 1 egg. Reserve 2 cups of the mix. Press remaining mixture into the bottom of a 9x13-inch cake pan.
Blend icing, cream cheese, sour cream, and remaining 2 eggs and pour over top.
Cool to room temperature and then store in refrigerator. *May sprinkle with powdered sugar before serving if desired.