Kit Kat Cake

Ingredients

• ["FOR THE CAKE:", "1 box Devil's Food Cake Mix, Any Brand, I Use Betty Crocker, 18 Ounce Box", "1 box Instant Chocolate Pudding Mix, 3.9 Ounce Box", "3 whole Eggs", "1-1/4 cup Water", "1/2 cups Canola Oil", "FOR THE BUTTERCREAM FROSTING:", "3-1/2 cups Powdered Sugar", "1/2 cups Cocoa Powder", "3/4 cups Butter, At Room Temperature", "1/4 cups Shortening, At Room Temperature", "1 teaspoon Vanilla Extract", "5 Tablespoons Up To 8 Tablespoons Of Heavy Whipping Cream", "FOR THE DECORATION:", "11 packages (4 Sticks Each) Kit Kat Bars", "12 ounces, weight Plain M&Ms, More If Needed", "20\" Piece Of Ribbon Of Your Choice""]"