3/4 cup whipping cream
2 tablespoons butter
2 tablespoons alcohol (Cognac, brandy, Grand Marnier, kirsch, rum, bourbon, or Kahlua to name a few) (optional)
Place the chopped chocolate in a medium sized stainless steel bowl. Set aside. Heat the cream and butter in a small saucepan over medium heat. Bring to a boil. Immediately pour the boiling cream over the chocolate and allow to stand for 5 minutes. Stir with a whisk until smooth. If desired, add the liqueur. Cover and place in the refrigerator until the truffle mixture is firm (this will take several hours or overnight).
Place your coatings for the truffles (cocoa, toasted coconut, chopped nuts) on a plate. Remove the truffle mixture from the refrigerator. With your hands, or else a melon baller or small spoon form the chocolate into round or mis-shaped bite-sized balls. Immediately roll the truffle in the coating and place on a parchment lined baking sheet or tray. Cover and place in the refrigerator until firm. Alternately, after forming the truffles, put them in the fridge to firm up, and then dip them in melted chocolate before returning them to the fridge to harden. Truffles can be refrigerated for a couple of weeks or else frozen for a couple of months. Bring to room temperature before serving.
revised from Joy of Baking.com