Combine almond flour, erythritol, and baking powder in a bowl.
Add cold butter, diced, and mix with your hands until crumbly like streusel.
Add egg and vanilla extract, then bring the dough together.
Flatten the dough to a suitable thickness and cut into desired shapes.
Bake in a 180°C oven for 18-20 minutes.
Place on a cooling rack to cool.