1. Allow your butter and cream cheese to soften only slightly.
  2. Using the paddle attachment of your stand mixer, thoroughly cream the cream cheese, butter and vanilla extract together.
  3. Add the cake mix and egg, mixing thoroughly.
  4. Cover dough with plastic wrap and refrigerate AT LEAST 2 hours. It’s key that you don’t shorten this step, if the dough is too warm, it’ll be tacky and difficult to roll. An easy test is to check your fingers-if your fingers are covered in dough, the dough is too warm and should be placed back in your fridge.
  5. Once properly cooled, preheat your oven to 350 F degrees. Place powdered sugar in a small bowl.
  6. Take your dough out of the fridge. Pinch off walnut-sized portions of dough, roll into balls and then cover in powdered sugar. Place ball on cookie sheet, about 2 inches apart-the dough has a pretty good spread as it cooks, so be sure to give your cookies enough room on the cookie sheet!
  7. Bake for 12 minutes, or until a rich golden brown on the bottom.
  8. Allow to cool on the pan. Dust with additional powdered sugar.