Prepare the Manischewitz® Extra Moist Chocolate Cake according to directions.
Set batter aside.
In a separate bowl, mix together the cream cheese, egg, sugar, and salt.
When the cream cheese batter is combined well and has a creamy consistency, add the chocolate chips and mix again.
Fill each muffin tin cup 1/3 full with the chocolate batter and then top with a generous dollop of the cream cheese batter.
Bake for 25 to 30 minutes in a 350 degree F oven.