Preheat the oven to 180°C (356°F).
Mix almond flour, baking powder, and salt in a bowl.
Add egg, erythritol, melted butter, and vanilla extract, then mix well.
Add parmesan cheese powder and yellow cheese powder, and knead into a dough.
Divide the dough into bite-sized pieces and shape into balls.
Place on a baking tray lined with parchment paper.
Bake at 180°C (356°F) for 15–20 minutes.
Let cool on a wire rack before serving.