Easy Irish Cream Truffles

• 12 ounces dark chocolate, chopped
• 1/4 cup Irish cream liqueur
• 1/4 cup heavy cream
• 2 egg yolks
• 1 tablespoon butter

Melt the chopped chocolate, together with the Irish cream and heavy cream over low heat.  Whisk in yolks, one at a time.  Mixture will thicken.  Whisk in butter.  Refrigerate overnight, or until firm.  With spoon make small balls.  Roll in powdered sugar, cocoa, chopped nuts, etc.