Place the cookies in a plastic bag and crush them with a rolling pin until you have fine crumbs. You can also pulse them in a food processor for a very even crumb that holds together better.
Transfer the crumbs to a bowl, pour in the melted butter, and mix until all the crumbs are evenly coated and look like wet sand.
Press the crumb mixture firmly into the bottom of an 8 inch (20 cm) springform pan. Use the bottom of a measuring cup or glass to really pack the crust down so it slices cleanly later.
Refrigerate the crust while you prepare the filling, at least 20 minutes.