Chocolate mousse: ingredients
85g dark chocolate (70% cocoa solids)
1tbsp cocoa powder, plus extra for dusting
½tsp instant coffee granules
½tsp vanilla extract
2 medium egg whites
1tbsp golden caster sugar
50g full-fat Greek yogurt
Chop the chocolate and put it into a heatproof bowl over a pan of simmering water. Mix the cocoa, coffee and vanilla with two tablespoons of cold water, and pour over the chocolate.
Place bowl over the water, stir, then remove from the heat. Stir in two tablespoons of boiling water. Leave to cool.
In a mixing bowl, whisk the egg whites to fairly soft peaks, then whisk in the sugar until thick and glossy.
Beat the yogurt into the cooled chocolate. Fold about one-third of the egg whites into the chocolate using a large metal spoon, then gently fold in the rest of the whites until they are evenly mixed in. Spoon into four small cups or ramekins and chill for a few hours.