1 (about 18 1/4-ounce) pkg. chocolate cake mix
1 8-ounce pkg. cream cheese, softened
2 tbsp. margarine or butter, softened
1 tbsp. cornstarch
1 14-ounce can sweetened 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, margarine and cornstarch until fluffy. Gradually beat in sweetened condensed milk then egg and vanilla until smooth. Pour evenly over cake batter. Bake 50 to 55 minutes or until wooden pick inserted near center comes out clean. Cool 10 minutes. Remove from pan. Cool thoroughly. Glaze or sprinkle with powdered sugar when cool. Store covered in refrigerator.