It's inspired by this recipe: https://foodpluswords.com/graveyard-pudding-cups/ (but I used Oreos and added a brownie layer)
Bake a box of brownies.
Make a box of instant chocolate pudding.
Twist apart several Oreo cookies and scrap off the cream. Crumble as finely as possible.
Melt a few white chocolate chips (heating them back up every time it starts getting sticky). Use toothpick to write on the back of cinnamon graham crackers (broken on perforations). Use toothpick to make bone shapes on parchment or wax paper.
Put Oreo crumbs in the bottom of a clear cup or bowl. (Shaping Oreo cream worms and sticking them to the side of the container is optional.) Spoon a little pudding on top. Cut a brownie approximately the right size. Poke a gummi worm through the center of the brownie (it helps to cut the brownie in half). Squeeze brownie into container. Spoon in more pudding. Add more Oreo crumbs on top. Push graham cracker gravestone through the Oreo crumbs and pudding. Add a few white-chocolate bones. (If not eating immediately, don't add the graham cracker until right before eating, or it'll get soggy.)