Chocolate Mousse

Directions

1. 1
   Combine both chocolates and 2 tablespoons coffee in heavy small saucepan.
2. 2
   Stir over low heat until melted and smooth.
3. 3
   Remove from heat and stir in sour cream.
4. 4
   Set aside.
5. 5
   Mix sugar, egg whites, cream of tarter and salt with remaining 1/4 cup coffee in top of double boiler.
6. 6
   Using hand-held mixer, beat mixture until tripled in volume and thermometer registers 160F.on candy thermometer, about 4 minutes.
7. 7
   Remove from heat and continue beating 3 minutes.
8. 8
   Transfer mixture to large bowl.
9. 9
   Beat in vanilla extract.
10. 10
    Fold in warm chocolate mixture.
11. 11
    Spoon chocolate mousse into 6 small dishes and refrigerate overnight.