Brownie
Preheat the oven to 180°C.
Melt dark chocolate and unsalted butter together in a double boiler.
In a bowl, add erythritol, eggs, and vanilla extract and mix well.
Add the melted chocolate and butter, then mix again.
Add almond flour, baking powder, and salt, and mix evenly.
Pour the batter into the mold.
Top with nuts.
Bake in the oven for 20–25 minutes, then let cool.