IMGP2933250g chocolate
150g butter
60g flour
3 eggs
1 tsp salt 
1 vanilla sugar
1 tbsp of walnuts

Melt the chocolate with the butter in a pot. Meanwhile, in a bowl mix the eggs, the sugar, the flour, the vanilla and the salt. Add the melted chocolate-butter to the mix and stir again. Add the chopped walnuts.  Bake in a preheated oven on 180 C for 15 mins.

According to the biologist you should follow the recipe and the doses strictly…!!!