Roughly chop the chocolate. Melt chocolate and butter in a pot. Separate the eggs. Beat the egg yolks and 20 g sugar with the whisk of the hand mixer until creamy. Beat 3 egg whites, 1 pinch of salt and 20 g sugar until stiff. Stir chocolate and cream into the egg yolk mixture. Mix cocoa and flour and fold in alternately with the beaten egg whites
Grease the souffle tins (each containing approx. 200 ml) and sprinkle with sugar. Pour in the souffle mixture and bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes. Remove, dust with icing sugar if necessary and serve immediately