Choclate mouse

4 large egg yolks
1/4 cup sugar
2 1/2 cups heavy whipping cream.
1 1/2 semi sweet chocolate baking bars chopped

Beat egg yolks in a small bowl on high speed until thick and lemon color(3mins)
Gradually add sugar then beat.
eat one cup of whipping cream in a sauce pan over just until hot.
Gradually stir half of the hot cream into egg yolk mixture then combine back into hot cream in sauce pan.
cook over low heat for5 min,stirring ,until mixture is blended and thickens.
Let cool for 1omins.then add chocolate and stir until thick,about 5 min .Cover and refrigerate for about 2 hours,stirring occasionally just until chilled .

Beat remaining 1 1/2 cups whipping cream in chilled medium bowl on high until stiff.
Beat 3/4 cup of the whipping cream into the chocolate mixture until blended.
Fold remaining remaining whipped cream gradually into chocolate mixture until well blended.
Spoon mixture into cups .