Cream butter and cream cheese together in mixing bowl on medium speed.

Add egg and vanilla and mix until blended.

Add cake mix and mix until blended. Will be moist and sticky.

Place the cookie dough into the refrigerator for about 30 minutes prior to baking.

Scoop cookie dough by rounded spoonful. Roll into a ball and flatten between your palms.

Place cookies onto baking sheet lined with parchment paper or sprayed with non-stick spray.

Bake in preheated oven at 350º for approximately 12-15 minutes. Oven temperatures vary so check often.

Allow to completely cool before icing.

Store in airtight container up to 5 days.