Step 1

Use your favorite boxed chocolate cake mix, and bake the cakes in two 8-inch cake pans according to the package directions. Let the cakes fully cool to room temperature before frosting and decorating.

Step 2

Spread a generous, smooth layer of frosting between the layers and around the top of the cake and its outer layer, creating a double-layer cake. Editor's Tip: The best part about this cake is that it doesn’t matter how your frosting job looks—the top and sides will be covered with candy anyway!

Step 3

Break the Kit Kats into individual wafer bars. Gently press each wafer onto the cake vertically, side by side, around the entire cake. Leave a tiny amount of space between each wafer (about 1/4 inch) to allow for easy slicing. Continue until the outside of the cake is coated with a “fence” of Kit Kats.

Step 4

Cover the top of the cake with M&M's, slightly pushing them into the top layer of frosting to adhere. Slice into pieces and serve. Test Kitchen Tip: For an extra-festive presentation, tie a bow with a ribbon around the Kit Kat cake. (This will also help keep the Kit Kats in place until the cake is ready to serve).