Combine oatmeal, cake flour, baking powder, and salt in a bowl and mix well.
Add cold butter and break it up into small pieces by hand.
Add milk and honey, then knead the dough.
Shape the dough into a round and flatten it to a thickness of 2-3 cm.
Cut into appropriate sizes and place on a baking sheet.
Bake at 180°C for 20 minutes.