birthday cake with chocolate

ingredients:
4 eggs
400 g dark chocolate
200 g butter
2 tbsp flour
2 tbsp caster sugar
1 packet of yeast.
method:

Mix all ingredients until mixture a little liquid.
Add the melted chocolate and the mix well butter.
Pour into a buttered pan.
Bake for 20 minutes.
After baking the cookie, decorate with melted chocolate.
http://www.douniacuisine.com/Recette/1771/g-teau-d-rsquo-anniversaire-au-chocolat.php