chocolate mousse

The other day my husband requested clam chowder for dinner and chocolate mousse for dessert, a couple of his very favorite dishes.  He said this chocolate mousse was terrific and said it was just as good as a friend's of his who was a cook and worked his way through school teaching cooking classes.  I'll take it as a "Hall of Fame".  Thanks allrecipes!

chocolate mousse (allrecipes.com)
1 cup semisweet chocolate chipes
4 egg yolks, lightly beaten
2 tablespoons vanilla extract
2 cups heavy whipping cream
1/4 cup white sugar
1/2 cup whipped cream

Melt chocolate chips in a small, heavy saucepan over low heat; stir until smooth, about 5 minutes.  Stir a small amount of hot chocolate into egg yolk; return chocolate and egg mixture to pan, stirring constantly.  Cook and stir until slightly thickened, about 2 minutes.  Remove from heat; stir in vanilla extract.  Cool, stirring several times.
Beat heavy cream in a large bowl until it begins to thicken.  Stir in sugar; beat until soft peaks form.  Fold whipped cream mixture into cooled chocolate mixture.  Cover and refrigerate for at least 2 hours or over night.  Garnish with whipped cream.