Put the creme fraiche into a medium saucepan and place over medium heat. Stir until it begins to bubble and add the chopped chocolate. Stir well until the chocolate melts and the mixture is smooth. Pour into 8 souffle cups and chill, covered, for 2 hours. Serve with a dollop of whipped cream and a sprinkle of cocoa powder.
Recipe courtesy of Dan Smith and Steve McDonagh