6 ozchopped bittersweet chocolate or 1 cup chocolate chips(170 grams)
3largepasteurized egg whites or the equivalent egg whites from a carton(96 grams)
1pinchsalt
½cupheavy cream or half a tub (about 1 ¾ cups) of Cool Whip**
Instructions
Melt the ice cream over gentle heat in a large saucepan. Add the cocoa powder and whisk until smooth and warm.
When the ice cream mixture is hot, add the chopped chocolate and stir until smooth. Let cool to lukewarm.
With an electric mixer, beat the egg whites with the salt until they hold stiff peaks. Whisk about a third of the egg whites into the chocolate mixture to lighten, then gently fold in remaining egg whites.
Beat the cream until is just starts to hold its shape, then fold into the cooled egg/chocolate mixture. Alternatively, skip the cream and fold in a little over half a tub (5 oz/2 cups) whipped topping.
Divide among serving bowls and chill for an hour and a half or until stiff. If you want to pipe it, chill just long enough for it to stiffen, then pipe it out of a large piping bag with tip.
Notes
½ cup of heavy cream whips up to around 1 cup of heavy cream and weighs 4 oz. If you are substituting whipped topping, it's best to go with the equivalent weight, so 4 oz/114 grams of whipped topping is about 1 ¾ cup. The whipped topping is sweeter, lighter and fluffier than the whipped cream, so the mousse will be lighter.