Mix whole wheat flour and baking powder in a bowl.
Cut cold unsalted butter into small pieces, add it to the bowl, and rub it in with your hands until it resembles coarse crumbs.
Add milk and honey, then gently knead the dough.
Gather the dough, wrap it, and chill in the refrigerator for 10 minutes.
Roll out the dough to a 2cm thickness on a cutting board and cut into triangles.
Bake in a preheated oven at 180°C (356°F) for 20 minutes.