I just made this cake, It is really good.
Hope this is what you are looking for.

Texas Tornado Cake

1 1/3 cups shredded coconut
1 cup chopped pecans
1 German Chocolate cake mix
8 oz. cream cheese, softened
2 cups powdered sugar
1/2 cup melted margarine

Spray a 9x13 with Pam.

Layer 1- cover the bottom of pan with coconut and pecans.

Layer 2- Prepare cake mix according to package directions and pour over first layer.

Layer 3-Cream together powdered sugar, cream cheese, and margarine; spoon on top.

Bake at 350 degrees for about 45 minutes to an hour.

This cake will crack and look like a tornado hit it.