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