Bittersweet Chocolate Mousse

Directions

1. 1
   Whisk milk, egg yolks, and 2 tablespoons sugar in heavy small suacepan to blend.
2. 2
   Place over medium-low heat and stir until mixture thickens enough to coat spoon, about 7 minutes (do not boil).
3. 3
   Remove from heat.
4. 4
   Immediately add chocolate and whisk until smooth.
5. 5
   Whisk in vanilla.
6. 6
   Transfer mixture to medium bowl; cool to lukewarm, stirring occasionally, about 10 minutes.
7. 7
   Beat egg whites and salt in large bowl until soft peaks form.
8. 8
   Gradually add remaining 2 tablespoons sugar, beating until stiff but not dry.
9. 9
   Fold whites into cooled chocolate mixture in 3 additions.
10. 10
    Divide mousse among 6 goblets or transfer to serving bowl.
11. 11
    Refrigerate until cold and set, at least 6 hours.
12. 12
    (Can be made 1 day ahead.
13. 13
    Cover and keep refrigerated.)
14. 14
    Top mousse with whipped cream and chocolate shavings, if desired.