Mix almond flour, baking powder, and salt in a bowl.
In another bowl, whisk together eggs, erythritol, melted butter, and vanilla extract.
Combine the two mixtures and mix well.
Add dark chocolate chips or nuts if desired, and knead the dough.
Divide the dough into 6 portions and shape them into round, flat discs.
Bake in a preheated oven at 180°C for 20 minutes, then let them cool.