Preheat oven to 325°F.
Mix crumbs, sugar, and butter.
Press into pan base firmly.
Bake crust for 10 minutes.
Cool crust while preparing filling.
Beat cream cheese until fluffy.
Add sugar and flour, mix well.
Add eggs one at a time.
Mix in sour cream and vanilla.
Stir in espresso and chocolate.
Pour filling over crust evenly.
Bake 55-65 minutes until center set.
Turn off oven, cool inside.
Refrigerate at least 4 hours.
Top with cream or chocolate shavings.