3 to 6tablespoonsof heavy cream plus more as needed.
Directions
Heat oven to 350 degrees F. Grase and flour 13 x 9-inch pan. In small bowl, blend all filling ingredients, beat at highest speed until smooth and creamy. Set aside. In large bowl, blwnd cake mix, eggs, oil and water until moistened. Beat 2 minutes at highest speed. Pour half the batter into pan. Pour cream cheese mixture over batter, spreading to cover. Pour remaining batter over cream cheese mixture. Bake at 350 degrees F for 45-55 minutes or until toothpick inserted in center comes out clean. Cool completely. Frost with your favorite fudge frosting (or use recipe above). Store in refrigerator.