In a large bowl, sift cocoa and powdered sugar together. Add the whiskey and corn syrup; mix until well blended.
Fold in crushed vanilla wafers and nuts and mix thoroughly. Refrigerate 1 to 2 hours.
Using your hands, roll the chilled dough into small balls and then roll in powdered sugar.
Store, covered, in air-tight container in the refrigerator.
* The better the quality of the bourbon used in these cookies or candy, the tastier they are.
Kentucky Bourbon Balls Recipe: https://whatscookingamerica.net/cookie/bourbonballs.htm