Beat together the cream cheese, egg, sugar and salt until smooth. Stir in chocolate chips and set aside.
In a seperate bowl, stir together the water, oil, vinegar and vanilla. Combine remaining ingredients and stir in to the liquid. Whisk together until smooth, or mix on medium speed for 2 minutes. Batter will be thin.
Grease two muffin tins, or use paper liners, and fill each with a 1/4 c. batter. Put about one tablespoon of the cheesecake mixture in the center of each cup.
Bake at 350 degrees for 20-25 minutes. Cool completely before eating. Store in the refrigerator.