Prepare oven to 180 degrees.
In a bowl, sift the flour, cocoa, salt and baking soda and set aside.
In a mixer bowl, mix the eggs, sugar, vanilla until homogeneous.
Then add in the dry ingredients until incorporated.
Mix in the chocolat and the nuts.
On a floured surface, shape into 2 flat-ish logs and brush with beaten egg and drizzle the 2 tbsp of sugar.
Bake for 25 minutes and then cool for 10 on the counter.
Slice them 1-1.5 cm thick and bake again for 20 minutes at 160 degrees flipping them halfway for even cooking.
Store in a airtight container and enjoy with a hot cup of coffee!