01 - 
                Heat oven to 350°F. Line baking sheets with parchment paper.
              
              
              
                02 - 
                Beat cream cheese, butter, egg and vanilla until smooth. Stir in cake mix until thick dough forms.
              
              
              
                03 - 
                Gently fold in sprinkles, avoiding overmixing. Chill dough 30 minutes.
              
              
              
                04 - 
                Roll dough into 1 1/2-inch balls, coat in powdered sugar. Place 2 inches apart on sheets.
              
              
              
                05 - 
                Cook 10-12 minutes until edges set but centers soft. Cool on sheets then transfer to rack.