Preheat the oven to 180°C (356°F).
Finely chop the almonds.
In a bowl, mix almond flour, baking powder, and salt.
In another bowl, mix the eggs, unsalted butter, and erythritol.
Combine the dry ingredients with the wet ingredients.
Shape the dough into a round, flat disc.
Place the dough on a baking tray and bake for 20 minutes.