Preheat the oven to 180°C (356°F).
Wash the mugwort thoroughly and remove excess water.
In a large bowl, mix cake flour, baking powder, sugar, and salt.
Add finely chopped cold butter and mix evenly.
Add mugwort and milk, then knead the dough loosely.
Roll out the dough to 2cm thickness and cut into triangles or circles.
Place parchment paper on the pan and arrange the dough pieces on top.
Bake in the oven at 180°C for 20–25 minutes.