Whisk the milk and Jello pudding mix together until smooth. Set aside and let it set for 5 minutes.
Meanwhile, crush the Oreo cookies in a plastic bag using a rolling pin.
Once the pudding has set, fold in the Cool Whip topping. Add 1/2 the bag of crushed cookies and mix in gently.
Pour
the mixture into a 9" x 13" pan and sprinkle the remaining cookie
crumbs over the top, covering the entire area. Chill in the fridge for 1
hour.
Use the red decorating gel to outline gravestones on the 3 vanilla cream cookies.
Take
the chilled dessert out of the fridge and place your gravestone cookies
into the dessert. Add dollops of Cool Whip to resemble some ghosts and
finish off with candy pumpkins and candy corn. Keep chilled until ready
to set out on the table at your ghost party.