Separate the Egg (4) and set the egg whites and egg yolks aside.
Place Semi-Sweet Dark Chocolate (300 gram) in a microwave-safe dish and heat for 30 seconds. Stir and repeat until the chocolate is melted and smooth. Set aside to cool.
Beat Egg Whites until the mixture forms soft peaks.
Slowly combine the Egg Yolks with the chocolate, stirring throughout.
Carefully fold in the egg white mixture, 1/3 at a time.
Lightly grease a standard cake pan and line the base with baking paper. Pour batter in.
Bake at 170 degrees C (350 degrees F) for 30 minutes.
Run a knife along the outside edge to separate the cake from the tin, then place a serving plate over the top and flip gently. Lift the tin and remove baking paper.
Allow cake to cool and add desired frosting or toppings. Serve and enjoy!