Cream together and set aside:
1/4 C. margarine
8 oz. cream cheese
1 cup powdered sugar
3 1/2 cups milk
2 (6 oz.) pkgs. French vanilla pudding
12 oz. Cool Whip
Beat milk and pudding 2 minutes with mixer. Fold in Cool Whip. Combine with cream cheese mixture. Crush 20 oz. pkgs. of Oreo cookie in blender or food processor, a few at a time until the consistency of dirt.
Use a clean flower pot to serve. Place 1/4 of cookie mixture in pot, then 1/3 of pudding mixture. Keep layering this until you end with "dirt" on top. Refrigerate. Put a few silk flowers in center, add some gummy worms "crawling" out of the pot! Serve with a trowel.