Mix oatmeal, cake flour, baking powder, salt, and sugar evenly.
Add cold butter and quickly mix with your hands until it resembles coarse crumbs.
Add sliced almonds and milk, then bring the dough together into one mass.
Roll the dough out to 2cm thickness and cut into desired shapes.
Bake in a preheated oven at 180℃ for 15–20 minutes.