Preheat the oven to 350° and line a baking sheet with parchment paper. Set aside.

In a large mixing bowl, add the cake mix and sprinkles. Mix well.

Add the oil, butter and eggs. Using a wooden spoon, mix until all ingredients are thoroughly combined. Don't use an electric mixer or overmix the cookie dough.

Using a cookie scoop, scoop the dough onto the baking sheet, about 1 ½ - 2 inches apart.

Bake for 10-12 minutes, or until the edges barely begin to brown.

Remove from heat and carefully move the cookies to a wire rack to cool completely.

Once the cookies have cooled, add ½ cup of vanilla frosting to a microwave-safe bowl. Heat in 10-second increments until completely melted. Stir between heating.

Dip one side of each cookie into the melted frosting and place the cookies back on the wire rack. Add sprinkles before the frosting dries.