Place the chocolate in a bowl and melt it in a microwave. Heat butter in a non stick pan, add refined flour and sauté lightly.
Add milk, little by little and mix well. Soufflé base is ready.
Remove melted chocolate from microwave. Turn off the heat and add melted chocolate to the soufflé base.
Mix well. Transfer into a bowl and set aside to cool. Add half the castor sugar and mix.
Preheat oven at 180° C. In another bowl, take egg whites and whip adding little of the remaining castor sugar from time to time.
Beat the eggs till soft peaks form.
Add a little of the whipped egg whites to the chocolate and mix well.
Then add the remaining egg whites and mix well. Pour this mixture into greased soufflé moulds.
Bake in the preheated oven for 12-14 minutes. Serve warm or chilled.