Pulse the cookies in a food processor or blender until they become crumbs. The consistency should be a slightly coarse fine powder. We don't want big chunks of cookie! If you don't have a food processor or blender, feel free to throw the cookies in a bag and smash them with a hammer until a fine crumb forms.
In a mixing bowl, combine the cookie crumbs with the softened butter and use your (clean, washed) hands to massage the butter into the cookie crumbs until it's all incorporated. The consistency should feel like a buttery kinetic sand.
Pat the cookie mixture into springform or disposable pie pan. Start on the bottom and then flatten the crust out, until you get to the sides of the pan. Press the crust mixture onto the sides, evenly lining the entire pan. If you don't have aa disposable pie pan or springform pan, line a cake pan with parchment paper or foil, leaving a lot of extra foil/paper outside of the pan for an easy removal. If using foil, make sure you don't accidentally fold the foil into the crust!
Cover the crust and set it in the freezer to set while you work on your filling, or keep for a few months in the freezer.