4 level tbsp. Hershey cocoa (not hot chocolate mix)
1 1/2 c. flour
3/4 c. sugar
1 tsp. baking soda
3/4 c. milk
3/4 c. Best Foods mayonnaise
1 tsp. vanilla

Spray 9"x13" pan with Pam (no need to flour). Mix all dry ingredients together. Gradually add milk, fold in mayonnaise and vanilla. Pour into prepared pan. Batter is thick, so spread evenly.

CREAM CHEESE MIXTURE:

8 oz. cream cheese, room temp.
1/3 c. sugar
1 egg
1 c. (6 oz.) chocolate chips

Mix cream cheese with sugar. Beat in egg. Add chocolate chips to mixture. Spread this mixture in marble fashion over whole top of cake mix in pan. (Don't stir in.) Be sure every piece to be cut is covered with cheese mixture. Bake 25 to 30 minutes at 350 degrees. Needs no additional frosting. Very rich. Serve warm or cold.