Combine whole wheat flour and baking powder in a bowl.
Cut cold butter into small pieces and rub it into the flour mixture by hand.
Add sugar and salt and mix well.
Gradually add milk, mixing until a dough forms.
Gently fold in raisins, nuts, or other add-ins as desired.
Flatten the dough thickly and cut into triangles or circles.
Place on a baking tray lined with parchment paper.
Bake in a preheated oven at 180°C (356°F) for 20-25 minutes.