Preheat oven to 350 degrees F. and spray a bundt pan generously with non stick cooking spray. Place cake mix, eggs, oil, milk, sour cream, pudding mix and sprinkles into a large mixing bowl. Stir until well combined. Pour cake into bundt pan, spreading even. Bake for 50-60 minutes, or until toothpick comes clean from center or cake. Remove and let cool 15-30 minutes before flipping and transferring to a cake stand.
Melt white candy melts until smooth. Drizzle over top of cake and top with more sprinkles. Serve room temperature.