How to make
In a water bath, heat the chocolate and butter until they melt, and let the mixture cool.
Beat the eggs with the sugar.
In a large bowl, mix the flour and ground walnuts, add the eggs, vanilla sugar and a few drops of rum essence.
Add the chocolate mixture and stir.
Put baking paper in a baking tray, grease it with oil and pour the resulting dough.
Bake the brownie in an oven preheated to 360°F (180°C) for about 25-30 minutes.
The most chocolate brownie of Vanilla (The Fairy from the Sugar Bowl) is very tasty.