Preheat the oven to 180°C (356°F).
In a bowl, mix together whole wheat flour, baking powder, sugar, and salt.
Cut cold butter into small pieces and quickly rub it into the flour mixture by hand.
Add milk and mix until the dough comes together.
Roll out the dough to a thickness of 2cm and shape into rounds.
Place on a baking sheet and bake in the oven for 18–20 minutes.