French chocolate cake (Gateau au chocolat - with bananas?)

[UPDATED] Gateau au chocolat is the french chocolate cake that is more liquid in the center than a sponge cake. I started to make this cake for a friend that could not eat gluten and my kids loved it, so I keep doing it often :)
I update today this recipe by adding 2 sliced bananas and some cinnamon inside that I believe will add a sparkle to this recipe and change from the classic version. You can do the same by adding pears instead of bananas. Up to you ...
Once in a while, you have to play a bit with classic recipes, that's the fun with cooking :)