Preheat the oven to 180°C (356°F).
Wash the mugwort thoroughly and remove excess water.
Combine almond flour, coconut flour, baking powder, and salt in a bowl and mix well.
Add eggs, unsalted butter (at room temperature), and erythritol to make the dough.
Finely chop the mugwort and add it to the dough, mixing evenly.
Divide the dough into appropriate portions and place them on a baking sheet.
Bake at 180°C (356°F) for 20 minutes.