Total Time
1hr 25mins
Prep 1 hr
Cook 25 mins

From Cook's Do not substitute regular chocolate chips for the miniature chips. Regular chips are much heavier and will sink to the bottom of the cupcakes. Prep/cook time does not include time to bring ingredients to room temperature.

Ingredients Nutrition


  1. 4/2007.
  2. Adjust oven rack to lower-middle position and heat oven to 400 degrees. Line 2 standard muffin tins with cupcake liners.
  3. With electric mixer on medium speed, beat cream cheese, 1/2 cup sugar, and 1/4 teaspoon salt in medium bowl until smooth, about 30 seconds. Beat in egg whites and 2 tablespoons sour cream until combined, about 1 minute. Stir in chocolate chips and set aside.
  4. Whisk remaining sugar, remaining salt, flour, cocoa, and baking soda in large bowl. Make well in center, add remaining sour cream, water, butter, and vanilla and whisk until just combined. Divide batter evenly among 24 cupcake liners and top each batter with 1 rounded tablespoon cream cheese mixture. Bake until tops of cupcakes just begin to crack, 23 to 25 minutes. Cool cupcakes in tins for 10 minutes before transferring to wire rack to cool completely. (Cupcakes can be refrigerated in airtight container for up to 2 days.).