In a large bowl, beat the cream cheese, egg, sugar and salt until smooth. Stir in chocolate chips; set aside. , For batter, in a large bowl, combine the water, oil, vinegar and vanilla. Combine remaining ingredients; add to the liquid mixture and mix well (batter will be thin). , Spoon about 2 teaspoons of batter into greased or paper-lined miniature muffin cups. Top with about 1 teaspoon of filling. , Bake at 350° for 18-23 minutes or until a toothpick inserted in cupcake portion comes out clean. Cool for 10 minutes before removing to wire racks to cool completely.