Preheat the oven to 350 degrees F. Grease two identical 9-inch round cake pans.

In a large mixing bowl, combine Devil's Food cake mix, water, eggs, and vegetable oil. Mix on medium speed 2 minutes until combined.

Divide the batter between two cake pans.

Bake cakes for 24-30 minutes until a toothpick inserted into the center of the cake comes out clean. Cool the cake layers completely.

Use a stand mixer to whip up Chocolate Buttercream Frosting.

When the cake layers are cool, level the cakes if needed then place one layer in the middle of the serving plate.

Cover the top of the chocolate cake with a layer of chocolate buttercream frosting,

Add the second layer then spread chocolate frosting all over the sides and top of the cake with a knife. Make sure the top of the cake and frosting is level.

Separate the Kit Kat bars into individual sticks.

Place the Kit Kat sticks side-by-side all the way around the cake, pressing them gently into the chocolate frosting. Make sure each Kit Kat is right up next to the one beside it.

Place the cake into the refrigerator to firm up for at least 30 minutes.

Remove the cake from the refrigerator and add the candies and decorations to the top.