Preheat the oven to 180°C (355°F).
Combine cake flour, baking powder, and salt in a bowl and mix well.
Add cold butter and break into small pieces using your hands or a pastry cutter.
Add sugar and yogurt, and mix with a spatula to form a dough.
Roll out the dough to a thickness of 2cm, then cut into triangles or circles.
Place the shaped dough pieces onto a baking tray.
Bake in the oven at 180°C (355°F) for 20-25 minutes.
Add your desired toppings before they cool and enjoy.