Mocha Truffles

Grrrrrgh!
Course : Truffles
From: HungryMonster.com
Serves: 48
 

Ingredients:

2/3 cup butter
1 large egg yolk
6 ounces semisweet chocolate -- melted and cooled
1 teaspoon instant coffee
1 tablespoons rum -- (optional)
1 cup chocolate wafer cookies -- crumbled
 

Preparation:

1. Cream butter until smooth. Blend in egg yolk and sugar. 2. Add chocolate, coffee and rum (if using); mix well. 3. Chill until firm enough to handle (about 3-4 hours). 4. Drop mixture into wafer crumbs, and roll to coat all sides and form a ball. 5. Drizzle with additional chocolate if desired.