Combine oatmeal and flour in a bowl and mix well.
Add cold butter, cut into small pieces, and blend it into the oatmeal and flour by hand.
Add yogurt and milk to make a dough.
Shape the dough into one mass and cut it into suitable sizes.
Place the dough pieces on a baking pan and bake in a preheated oven at 180℃ for 20-25 minutes.