Dianne,

I found this recipe on the internet. It sounds
like the cake you are looking for. Perhaps, you
can substitute a chocolate cake for the base.

German Chocolate Cheesecake
From Lisa

1 German Chocolate Cake Mix
Two 8-ounce packages cream cheese, softened
4 eggs
1-1/2 cups sugar
1 container German Chocolate Frosting

Preheat oven to 275 Degrees F. Grease and flour
a 9 x 13 pan. Mix cake mix according to the directions
on the box. Pour half of the cake batter into the
pan and spread evenly. Bake 7-15 minutes until
mix is set a bit. (Use other half of batter to make
some cupcakes, etc.) In a separate bowl, blend
together the cream cheese, eggs and sugar until
smooth and creamy. Spoon over cooled cake.

Bake 45 minutes to 1 hour and 15 minutes at 275
until set.

Let cool. Put frosting on top. Refrigerate.

Hope this helps!