1 box yellow cake mix
3 (8 oz) pkgs cream cheese, softened
3/4 cup sugar
2 tsp vanilla, divided
3/4 cup sour cream
3 eggs
2 oz unsweetened chocolate squares
2 tbs butter OR margarine
1 cup 10x sugar

grease bottom of a 10″ springform pan. prepare cake mix as directed on pkg; pour into the prepared pan.

bake at 325° for 25 minutes if using a silver springform pan; 300° for 20 minutes if using a black nonstick springform pan. cool.

beat cream cheese, sugar & 1 tsp of the vanilla in a lg bowl with an electric mixer on medium speed until well blended.

add sour cream & mix well.

add eggs, one at a time, mixing on low speed after each addition until just blended. pour over cake layer in pan.

bake at 325° for 40-45 mnutes or until center is set if using a silver pan; 300° for 40-45 minutes or until center is set if using a dark nonstick pan.

run a knife or metal spatula around the rim of the pan to loosen cake; cool before removing rim.

place chocolate, milk & butter in a medium microwavable bowl.

microwave on HIGH 2 minutes, or until butter is melted, stirring after 1 minute. stir until chocolate is completely melted.

add 10x sugar & remaining 1 tsp vanilla. mix well.

spread over cooled cheesecake.

refrigerate 4 hours or overnight.