Preheat the oven to 180°C (356°F).
Mix almond flour, cocoa powder, baking powder, and salt together in a bowl.
Cut in cold butter and mix evenly with your hands or a pastry cutter.
Add erythritol and dark chocolate, then mix.
Add eggs and almond milk to make the dough.
Shape the dough into a flat disk, then cut into your desired shapes.
Place the dough pieces on a parchment-lined baking tray.
Bake in the oven at 180°C (356°F) for 20 minutes.