Preheat the oven to 350°
Beat the cream cheese and butter in a mixer until smooth and creamy. Beat in the egg and vanilla.
Add the cake mix then beat until well incorporated.
Cover with a saran wrap then store in the fridge to chill for 2 hours. This will firm up the batter which would make it easier to form into balls.
After chilling for 2 hours, scoop a tablespoon of batter and roll into a ball.
Place the confectionery sugar into a flat container/pie plate. Roll the balls into the powdered sugar.
Place the cookie balls in a cookie sheet. Bake them in the oven for 10 minutes. Do this in batches.