Rum balls (thing)

2 Cups Very Fine Vanilla Wafer Crumbs
1 Cup Chopped Walnuts (optional)
2 Cups Powdered Sugar (VERY FULL CUPS)
4 TBSP (level) Cocoa
Mix above ingredients well in a large bowl. Add: 1/2 Cup Rum. Roll into&1/2 inch balls, coat with powdered sugar than refrigerate.