German Chocolate Brownie Cheesecake

For Crust:

Grease the inside of a 13x9 inch baking pan. Combine cake mix, margarine and egg in a large bowl and mix until crumbly. Press the crust mixture evenly into the bottom of the prepared pan.

For Filling:

Preheat oven to 350 degrees. Beat together cream cheese, eggs, sugar and vanilla in a large bowl until smooth and fluffy. Spread the filling mixture evenly over the prepared crust. Bake cheesecake about 20 to 25 minutes until edges are browned.

For Topping:

Stir together sour cream, sugar and vanilla in a medium bowl until smooth. Spread the topping over the warm cheesecake. Bake an additional 5 minutes until topping is set. Remove cheesecake from the oven and refrigerate at least 8 hours before slicing and serving.