Method Prep:30min › Cook:5min › Extra time:4hr › Ready in:4hr35min
In a microwave or bain marie, heat chocolate, 60ml water and butter until the chocolate and butter are melted. Remove from heat and cool for 10 minutes.
In a small heavy saucepan, whisk egg yolks, sugar and remaining water. Cook and stir over low heat until mixture reaches 70 degrees C, about 1-2 minutes. Remove from the heat; whisk in chocolate mixture. Set saucepan in ice and stir until cooled, about 5-10 minutes.
Fold in whipped cream. Spoon into six dessert glasses. Refrigerate for 4 hours or overnight.