Crumble cake into an extra large mixing bowl. Add at least 3/4 or all of the tub of frosting and stir until very well mixed. I like to use my hands and I usually wear gloves.
Note: A food processor makes easy work of creating a chocolate ganache. If you don’t have one, finely chop your chocolate and put it in a microwave safe mixing bowl. Boil cream as above and pour over chocolate and let sit for 2-3 minutes. Use a whisk to create an emulsion. Begin by stirring just in the center of the bowl, then slowly bring the whisk out to the edge of the bowl. Stir just until combined and the ganache is smooth. If you have chunks of chocolate remaining, place entire bowl in microwave and heat on high for 10 seconds. Stir until melted.
Set your cake on a serving platter or if you prefer you can place it on a spider web. Attach the legs to the spider’s body by just pressing the short side of the leg into the cake.