Cook over medium heat until just boiling. Remove from heat.
Add chocolate and stir until melted.
Pour mixture into a Large Silicone Bowl and beat with electric beater for 5 minutes.
Add egg yolks and continue to beat until cool (8-10 minutes). Refrigerate overnight in an airtight container.
Take a small amount of chocolate mixture and roll into 3cm balls.
Roll the balls in the sifted cocoa and package for gifts or serve at your next dinner party.
Notes
Chocolate mixture will be keep for up to 3 weeks in the refrigerator. Try chocolate balls dipped in melted white chocolate. To set, place a Baking Sheet on the Cookie Tray.