How to make
All products, except for the walnuts, are mixed in a blender and blended.
Grind the walnuts separately and add them to the resulting mixture.
Stir and pour the mixture into a baking pan onto baking paper. Bake the brownie in a preheated 390°F (200°C) oven.
If desired, you can make a cream and spread it or pour melted chocolate over it.
