170g good quality dark chocolate, (broken into pieces)
1/4 cup instant coffee
4 eggs, separated
2/3 cup caster (superfine) sugar, plus an extra tbsp which you’ll use later in recipe
2 tbsp of dark kirsch liqueur
1 tbsp water
A pinch of salt
Fresh cherries to serve
Heat a saucepan of water and set a heatproof bowl on top. Into the bowl add the coffee, chocolate and butter, warm slowly over simmering water until melted, stirring occasionally. Once melted, set aside.
Into a new large bowl add a few handfuls of ice and fill halfway with water. Set aside nearby. Using the same saucepan of water, continue to simmer and place a new bowl on top into which; add the 4 egg yolks, caster sugar, water and kirsch. Using a balloon whisk or a hand-held electric beater - whisk for about 3 minutes until the mixture thickens, pales in colour and has a similar consistency to runny mayonnaise.
Remove from heat and place bowl into the larger bowl of iced water. Be careful not to let any water into the smaller bowl. Continue to whisk for a further few minutes until the mixture thickens considerably and is cooled. Add the chocolate mixture into the beaten eggs and stir to combine.
In an stand mixer whip up the egg whites along with pinch of salt until almost stiff and frothy. At this stage add in one tablespoon of extra caster sugar and beat again until almost glossy.
Using a large mixing spoon, add one spoonful of egg whites into the chocolate mix, fold in gently then add the remaining egg whites, folding in until almost fully combined. Be careful at this stage not to over whip as you’ll lose all the air which is needed to be present to produce a light mousse.
Pour mixture into individual serving bowls/glasses. Top with a cherry and place in fridge.
Chill for approx. 3-4 hours and serve.