In small bowl, combine cookie crumbs and butter. Press onto bottom of greased 9 in springform pan.

Refrigerate while preparing filling.

In large bowl, beat cream cheese and sugar until smooth. Beat in chocolate and vanilla.

Add eggs, beat on low speed just until combines.

Fold in half of chopped cookies. Pour over crust.

Sprinkle with remaining cookies. Place pan on a baking sheet.

Bake @ 325°F for 50-60 minutes.

Cool for at least an hour. Refrigerate overnight.