Preheat the oven to 180°C (356°F).
In a bowl, mix whole wheat flour, baking powder, and salt.
Add cold butter and quickly mix by hand until crumbly.
Add milk and sweetener and form the dough into one mass.
Roll out the dough to a thickness of 2cm and cut into your desired shapes.
Place on a baking sheet lined with parchment paper.
Bake in the oven at 180°C (356°F) for 20 minutes.