Separate the egg whites and yolks.
Mix the yolks with erythritol.
Whip the egg whites until stiff peaks form.
Add low-carb flour and baking powder to the yolk mixture and blend well.
Gently fold the whipped whites into the yolk batter in 2-3 additions.
Pour the batter into a pan lined with parchment paper.
Bake in a preheated oven at 170°C (338°F) for 25-30 minutes.
Cool completely before eating.