1 c. sugar
1/3 c. light cream
2 tbsp. butter
2 sq. (1 oz. each) unsweetened chocolate, cut up
2 egg yolks, beaten

Dark Chocolate Filling: In medium saucepan, mix sugar, cream, butter and chocolate. Cook over medium heat, stirring constantly, until chocolate and butter are melted. Stir at least half of hot mixture into egg yolks; stir into remaining hot mixture in saucepan. Heat to boiling, stirring constantly. Boil and stir 1 minute. Remove from heat; cool completely.

Bake our white cake mix in 2 layer pans, 8 or 9 x 1 1/2 inch, as package directs except fold 2 squares (1 ounce each) unsweetened chocolate, coarsely shaved into batter. Fill layers with Dark Chocolate Filling (above). Frost side and top of cake. Sprinkle shaved chocolate on top.