Start with crushing the vanilla cookies or Nila wafers. Place them in a zip-lock bag and crush them with the help of a rolling pin.
Add crumbled cookies, butter, and sugar to a medium mixing bowl.
Fold them together until well combined.
Now prepare an 8-inches spring foam pan or casserole dish by spraying the cooking oil over them.
Add the prepared crumbs to the pan. Press it down and on the sides firmly and into a thin layer.
Let it refrigerate until we start preparing the filling.