1 (18 1/4 or 18 1/2 oz.) pkg. chocolate cake mix
1 (8 oz.) pkg. cream cheese softened
2 tbsp. butter, softened
1 tbsp. cornstarch
1 (14 oz.) can condensed milk (not evaporated milk)
1 egg
1 tsp. vanilla extract

Preheat oven to 350 degrees. Prepare cake mix as package directs. Pour batter into well greased and floured 10 inch bundt pan. In small mixer bowl, beat cheese, butter, and cornstarch, until fluffy. Gradually beat in sweetened condensed milk then egg and vanilla until smooth. Pour evenly over cake batter. Bake 50-55 minutes or until wooden pick inserted near center comes out clean. Cool 10 minutes. Remove from pan. Cool thoroughly. Glaze or garnish as desired. Store covered in refrigerator.