In a large mixing bowl, add finely shredded almonds, sugar, cacao powder, flour, cinnamon, and salt and combine with a wooden spoon.
Add two egg whites and mix them with the dry ingredients.
Add the melted chocolate and mix until a dough forms.
Wrap the dough in plastic foil and place it in the refrigerator. Let it chill for 2 – 4 hours.
Roll out the dough
Line a baking sheet with parchment paper.
Place dough on a lightly floured work surface. Don't use too much flour; since this dough only contains a small amount of flour, you don't want to add too much extra when rolling it out.
Roll out the dough with a rolling pin, roll it out until it is about ½-1 cm thick.
Cut the cookies with your favorite Christmas cookie cutter.
Fill a small bowl with water. Clean cookie-cutter frequently to keep the dough from sticking and to achieve sharp edges in the cookie.
Place the cookies on the baking sheet and let them dry overnight or for at least 6 hours.
Bake the Brunsli
Preheat oven to 460°F or 240°C.
Bake the Brunsli for 4 minutes (every oven is different so bake time might slightly differ). The cookies should be soft when you take them out of the oven. They will harden as they cool.
Notes
Cookies stay good for about two weeks in an airtight cookie tin.