In a deep bowl combine crushed vanilla wafer crumbs, chopped pecans, powdered sugar, and the cocoa.In a separate bowl, blend the bourbon and corn syrup.
Pour the bourbon mixture into the dry mixture; blend well.Cover and chill for 3 hours.Shape small bits of the dough into balls and roll them in the powdered sugar. Store in refrigerator over night in tightly covered containers.You can also make these a few days in advance for best flavor.
