01 - 
                Set your oven to 350°F and line baking trays with parchment paper.
              
              
              
                02 - 
                Combine butter, cream cheese, egg, and vanilla until it's creamy and smooth.
              
              
              
                03 - 
                Stir in cake mix until you get a thick dough. Gently work in the sprinkles.
              
              
              
                04 - 
                Pop the dough in the fridge for 30 minutes to firm it up.
              
              
              
                05 - 
                Form 1 1/2-inch balls and roll each ball in powdered sugar to coat.
              
              
              
                06 - 
                Space balls 2 inches apart. Bake 10-12 minutes until edges are set but centers stay soft.