DIY 4 Layer Candy Corn Cake from Sprinkle Bakes. If you are not a baker you can easily use white cake mixes and add food coloring. I suggest buying Wilton Paste Icing Colors because they will last you forever (get them with a coupon at Michaels in a set). You can use just a teeny bit of the paste on the end of a toothpick to get vibrant colors.
For more Halloween cakes like the Snake Cake, Centipede Cake and Spiderweb Cake go here.