Line a large baking sheet with parchment paper and set aside.
In a large bowl, combine the cake mix, vegetable oil, eggs, and vanilla. Stir until well incorporated.
Set the bowl in the refrigerator for 30 minutes to chill.
After 30 minutes, set the oven temperature to 350 degrees F.
Remove the bowl from the refrigerator. Scoop the dough into 1-inch balls and place on the baking tray, leaving about 2 inches in between each cookie.
Bake for 8-10 minutes. Do not over bake.
Remove the tray from the oven and let the cookies cool on a cooling rack.
While the cookies are cooling, microwave the melting bark in a microwave safe bowl in 30-second intervals until smooth.
Dip a cookie half way into the melted bark and set down. Sprinkle with the m&m’s or your preferred sprinkles. Set aside so that the bark can harden. If you want to speed up the process, place the cookies in the refrigerator for an additional 5 minutes.
Serve with your favorite glass of milk.