Wash the mugwort thoroughly and drain any excess water.
Combine eggs and sugar in a bowl and mix well.
Add milk and cooking oil, then mix evenly.
Sift in flour, baking powder, and salt, and mix.
Chop the mugwort, add it to the batter, and quickly mix.
Pour the batter into muffin molds.
Bake in a preheated oven at 180°C (356°F) for 20 minutes.