Bake your cake into 2 rounds (I used 8 inch rounds). After cooling, slice each cake round into two layers.

Stack three of your four layers and use a knife to carefully cut out a hole in the center (about 2 1/2 inches wide). Remove that cake portion leaving an open hole.

Separate your cake layers once again and frost between them.

Stack again, frosting between each layer.

Finish with the fully round (no hole in the middle) fourth layer.

Cover with frosting and decorate with extra spiders!