Preheat the oven to 180°C (356°F).
In a bowl, combine eggs, almond flour, baking powder, salt, and erythritol.
Fill the keto muffin mold halfway with the batter.
Crack one egg on top of the batter in each mold.
Add cheese as a topping.
Bake in the oven at 180°C (356°F) for 15-20 minutes.