1 pkg. chocolate cake mix
1 (8 oz.) pkg. cream cheese, softened
2 tbsp. butter, softened
1 tbsp. cornstarch
1 (14 oz.) can sweetened condensed milk
1 egg
1 tsp. vanilla

Preheat oven to 350 degrees. Prepare cake mix according to package. Pour into greased and floured bundt pan. Mix cream cheese, butter and cornstarch until fluffy. Gradually beat in sweetened condensed milk, egg and vanilla. Pour over cake batter. Bake 50-55 minutes. Glaze as desired. Store covered in refrigerator.