For the Filling: 8 oz. Philadelphia cream cheese, at room temperature 1/3 cup granulated sugar 1 large egg 1/8 teaspoon salt 1 cup (8 ounces) mini chocolate chips For the Cupcake Batter: 1 1/4 cups all-purpose flour 1 cup granulated sugar 1/4 cup unsweetened cocoa powder 1 teaspoon baking soda Pinch of salt 1 cup water 1 large egg 1/3 cup vegetable oil 1 teaspoon pure vanilla extract 1 teaspoon white vinegar For the Topping: 1/2 cup mini chocolate chips 1/3 cup granulated sugar Instructions : Preheat oven to 350 degrees F/180 degrees C. Line 20 muffin-pan cups with foil or paper cupcake or muffin liners. Make the Filling: In a bowl, using an electric mixer, beat the cream cheese with the sugar, egg and salt until smooth. Stir in the chocolate chips. Make the Batter: In a large bowl, whisk the flour with the sugar, cocoa, baking soda and a pinch of ...