2 tablespoons cocoa
1 cup powdered sugar
1/4 cup rum
2 tablespoons light corn syrup
2 1/2 cups vanilla wafer cookies -- crushed
1 cup pecans -- chopped
powdered sugar

Sift together cocoa and powdered sugar.
Combine and stir rum with light corn syrup.
Add and mix vanilla wafers and chopped pecans.
Roll ingredients together into balls.
Dip each ball into powdered sugar, or put them in a plastic bag and shake them in the sugar.

Source: Spencer Christian's Rum Ball Recipe