Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3).
Grease four ovenproof moulds (125 ml each) and sprinkle with sugar. Chop the chocolate. Melt butter and chocolate in a hot water bath while stirring.
Beat the eggs, egg yolks and 2 tbsp. sugar with the whisk of the mixer until white-creamy. Fold in chocolate butter. Stir in flour. Place in the moulds and bake in a hot oven for 15-20 minutes, the core should still be liquid.
In the meantime, cut the passion fruit in half and spoon out the flesh with the seeds. Turn the soufflés immediately onto dessert plates. Serve with ice cream and passion fruit.