Omitting the flour creates a richer, denser chocolate cake, which also has the advantage of being gluten free. Look here for flourless cakes, brownies and tortes.
You may never have baked a chocolate cake in a water bath before but it gives it an amazingly tender melt in the mouth quality.
This flourless chocolate cake will sink in the centre a little as it cools. You can fill up the indentation with whipped cream!
Make these individual chocolate cakes right before serving as they are best if they don't rest for long. They are warm and a bit molten.