Heat oven to 325.
Mix cookie crumbs and butter and press into bottom of spring form pan.
Bake for 10 minutes and cool.
Beat cream cheese, sugar, flour, and vanilla until well blended.
Add Chocolate and mix well.
Add eggs one at a time, on low speed and until just blended.
Bake for 55 minutes until center is almost set.
Remove from oven, run knife around edges and cool.
Refrigerate for at least 4 hours or overnight.
Top with berries of your choice and serve.