Smooth Black Chocolate Mousse 

125g (4 oz) dark chocolate chopped

1/4 cup whipping cream (double cream)

1/4 sugar

4 egg yolks

4 egg whites

pinch of salt

Making the Chocolate Mousse

1.  Melt the chocolate with the cream in a heatproof bowl over a pot of simmering water (making sure that the bottom of the bowl is not touching the water) whisk until smooth.

2.  Add the sugar to the chocolate in 2 batches and mix well.

3.  Remove from the heat and whisk in the egg yolks one at a time,  beat well after each addition.

4. Using an electric mixer beat the egg whites and salt until stiff peaks form when the beater is lifted.

5.  Fold one third of the chocolate mixture into the egg whites.

6.  Fold in the remaining chocolate mixture (do this in two batches) until well combined.

7.  Place the mousse mixture into a large serving bowl or divide into 4 glasses.  

8.  Chill for about 4 hours until set.