Cream butter and cream cheese together until well blended.
Add cake mix to creamed mixture (except cinnamon swirl mix, hold for later to roll cookies in.
Add egg and vanilla and mix well.
Cover dough and chill for 2 hours. This will make cookies easier to scoop out and roll in balls.
Once dough is chilled, roll into balls (about walnut size).
(you can use a large cookie scoop for this)
Mix cinnamon swirl mix (came inside box) with powdered sugar and roll cookie balls in cinnamon swirl mix and coat well.
Place cookies on an UN-greased cookie sheet (or parchment paper) and flatten slightly with the palm of your hand or the bottom of a flat cup or measuring cup sprayed lightly with baking spray. This will allow the cookie to be flatter and not bake up in a ball.