Combine whole wheat flour and baking powder in a bowl and mix.
Cut in cold butter and blend until the mixture is crumbly, like streusel.
Add milk and sugar to complete the dough.
Gather the dough, roll it to an even thickness, and cut it into triangle shapes.
Place on a baking sheet lined with parchment paper.
Bake in a preheated oven at 180°C (356°F) for 20 minutes.