1-First, grease three 6-inch cake pans with cooking spray to prevent sticking and ensure easy removal. Prepare the cake batter according to the box directions, adding orange food coloring gel to give it that festive hue, then divide the batter evenly between the pans and bake as per the package instructions. Once baked, let the cakes cool completely to room temperature before moving on, as this helps with layering and frosting.

2-Next, prepare the vanilla buttercream frosting and color the chocolate frosting black by mixing in black food coloring gel for the spider web effect. Place the first cake layer on a plate and pipe a border of vanilla buttercream around the edge using a large open-round piping tip or a plastic bag with a snipped corner; fill this border with the black chocolate frosting using an offset spatula. Stack the second layer on top and repeat the process, then add the third layer to complete the assembly.

3-After stacking, frost the top and sides of the cake with the remaining vanilla frosting for a smooth base. Use a piping bag fitted with a small round tip or another plastic bag with a snipped corner, filled with black frosting, to pipe a spider web pattern on the top and extend lines down the sides for a creepy touch. Finally, press small, dark cookies into the cake at the ends of the web lines and pipe spider legs and eyes on them using leftover white and black frosting.