Combine almond flour, baking powder, and salt in a large bowl.
In another bowl, mix together the eggs, erythritol, vanilla extract, and melted butter.
Pour the wet ingredients into the dry ingredients and mix with a spatula.
Refrigerate the dough for 10 minutes to firm up.
Divide the dough into 6 to 8 portions and shape into triangles.
Place the shaped dough on a parchment-lined baking sheet.
Bake in a preheated oven at 180°C for 18–20 minutes.
Cool completely on a wire rack.