This recipe is from the 1971 Betty Crocker Recipe Card Library. I hope it's the one your looking for.

BROWNIE CHEESECAKE

1 package of our German chocolate cake mix
1/2 cup shredded coconut
1/3 cup butter or margarine, softened
1 egg
2 packages (8 ounces each) cream cheese, softened
2 eggs
3/4 cup sugar
2 teaspoons vanilla
FOR THE TOPPING:
2 cups dairy sour cream
1/4 cup sugar
1 tablespoon vanilla

Heat oven to 350 degrees F.

In large mixer bowl, blend cake mix, coconut, butter and 1 egg on low speed until mixture is crumbly. Press very lightly in ungreased baking pan, 13 x 9 x 2 inches.

Beat cream cheese, 2 eggs, 3/4 cup sugar and 2 teaspoons vanilla until smooth and fluffy. Spread over cake mixture.

Bake 20 to 25 minutes.

Mix sour cream, 1/4 cup sugar and 1 tablespoon vanilla until smooth. Spread over cheesecake. Cool. Refrigerate at least 8 hours.

20 servings