Double Decker Delight

1 (18 1/4 oz) box German chocolate cake mix
4 eggs-divided
1 stick butter-softened
1 (8 oz) pkg cream cheese-softened
1 (1 lb) pkg powdered sugar
1 tbsp vanilla

Combine cake mix, vanilla, 2 eggs, and butter. Mix well.
Spread in bottom of prepared 9x13 baking dish.

Mix cream cheese, sugar, and remaining 2 eggs.
Spread mixture over 1st layer.
Bake at 375 for 45-50 minute.
May sprinkle with chopped nuts before baking.