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

Preheat oven to 350 degrees. Prepare chocolate cake batter as directed; pour into well-greased/floured bundt pan. In bowl, beat cheese, butter and cornstarch until fluffy; gradually beat in milk, egg and vanilla until smooth; pour evenly over cake batter. Bake 50 to 55 minutes or until toothpick comes out clean; cool 10 minutes. Remove from pan; cool thoroughly; store in refrigerator.