Julia Child's Chocolate Truffles made Pareve!

I can't imagine what Julia would have said if she had heard that her truffles were being made with --gasp--pareve margarine instead of her beloved butter.  They truly are equally delicious, but perhaps it's best that she never knew ;) 

Julia Child’s Chocolate Truffles- In My Words, and Pareve Yield: about 36 truffles

The original recipe is on page 472 of Vol. Two of Mastering the Art of French Cooking

These tiny little truffles are a chocaholic’s dream. They are rich, creamy and totally delicious! An extra perk is that these are a great treat for Passover!
Ingredients
1 tablespoon espresso powder/instant coffee dissolved in ¼ cup water
7 ounces pareve chocolate chips
2 ounces unsweetened baking chocolate
5 ounces pareve margarine
¼ cup orange liqueur
½ + cup unsweetened pareve cocoa
Equipment
Double boiler
Hand held electric mixer
Paper candy cups
Directions

1. Fill bottom of double boiler with just enough water so that the top does not touch water. Bring water to a boil and then reduce to a slight simmer.
2. Mince the unsweetened chocolate with a sharp knife and add it along with the chocolate chips and dissolved coffee to the top piece of double boiler. Insert the top into bottom of double boiler and cover. Remove cover every few minutes and stir until chocolate has melted. Beat chocolate with electric mixer until smooth. Remove from heat and continue to beat chocolate a few minutes until cool.
3. Cut margarine into tablespoons and beat them, one at a time, into chocolate. When you have a totally smooth mixture, dribble in the orange liqueur and beat until it is well incorporated into chocolate. Chill chocolate mixture about two hours until it is firm enough to scoop.
4. Pour cocoa onto a shallow dish. Separate about three dozen paper candy cups and line them up in front of you.
5. I’ve formed the truffles two ways. 1. Take two teaspoons. Scoop a small amount of chocolate with one and scrape it out with another. Then, mold an uneven ball with your hands and roll the ball into the cocoa. Place in a candy cup. 2. Scoop chocolate mixture with a small melon baller, scrape it out with a narrow knife, roll in cocoa and place in candy cup. I find the second option quicker, easier and neater.  Keep truffles refrigerated for a few weeks or keep them in the freezer for a few months.