Preheat the oven to 350°F. In a small bowl, stir together the cream cheese, egg, ⅓ cup sugar (for the cream cheese mix), chocolate chips, and a pinch of salt until completely combined.
In a separate, larger bowl, stir together the flour, 1 cup sugar, cocoa powder, baking soda, vegetable oil, water, white vinegar, vanilla, and ½ teaspoon salt.
Line a muffin tin with paper or aluminum cups. Fill each cup about 2/3 full with the chocolate batter. Add about one tablespoon of the cream cheese mix into the center of each cupcake.
Bake for 15-20 minutes, or until the chocolate batter has risen around the cream cheese filling. Let the cupcakes cool for the best results.
Serve at room temperature or chilled, and enjoy with your sweetheart.