Heat up the oven to 180C and make a dough:
Blend dates and boiled beans in a blender or food processor, then add eggs, milk, flour, baking soda, salt. Blend everything together.
In the end add pieces of walnut and mix with a spoon. The bigger the pieces the crunchier they sound.
Put the dough on a tray covered with parchment paper and bake in the oven for 30 minutes.
Once the brownie is baked remove it from oven and let cool down.