Toss the vanilla wafers in a food processor and process until the wafers are finely ground.
Pour the vanilla wafer crumbs into a large bowl along with the chopped pecans and stir to blend together.
In a small bowl whisk together the cocoa powder and the powdered sugar.
Pour in the bourbon and the corn syrup, stirring to blend together.
Add the bourbon and chocolate mixture to the vanilla wafers and pecans. Stir to mix the ingredients until well combined.
Chill at least 3 hours to let the mixture firm up. Using a teaspoon or a small ice cream scoop, gather up small rounds and shape into balls. You want them to be “bite size”.
Place the toppings for rolling into small bowls and roll each Bourbon Ball into one of the toppings.
Chill thoroughly before serving.
Keep chilled and stored wrapped or in a sealed container. Serve chilled or at room temperature.