I usually make "Ghosts in the Graveyard" pudding dessert, which I believe I got out of a Kraft Halloween recipe booklet. I'm sure you've all heard of it, but just in case:
Freeze a tub of whipped cream before you plan to begin.
Make instant chocolate pudding according to directions (2 pkgs if I recall? sorry, I can't find the recipe booklet), and spoon it into a square or rectangle dish.
Crush Oreos in a baggie (I'm sure there was a number to use, I never used as many as they said to), enough to cover the pudding as "dirt". The chocolate creme Oreos work best, if you don't want "snow" (white creme) in your "dirt".
Prop up graham crackers or other cookies to make tombstones with, write on them with food gel if desired
Spoon out "ghosts" using the frozen whipped cream to place around cemetery, add eyes with food gel if desired
Place mellowcreme pumpkins around cemetery, keep refrigerated before/after serving, of course.
I guess I don't have any existing pix of this, but it's cute and delicious! (OK, so I did a quick search for a photo online, and it includes the actual recipe if you need numbers
http://www.backofthebox.com/recipes/desserts/ghosts-in-the-graveyard-g.html)
This year, I'd like to make this:
http://www.instructables.com/id/Halloween-Graveyard-Brownies/ ...but I think it might work better if the bottom pan were dark metal rather than glass? It just seems like it would make a brighter glow, although I guess it might be difficult to find a metal pan that your glass pan could fit into.