Mix the butter, cheddar cheese powder, and sugar substitute (stevia) until well combined.
Add the egg and mix again.
Sift in cake flour and baking powder, then knead into dough.
Wrap the dough in plastic wrap and let it rest in the refrigerator.
Divide the dough into appropriate portions and shape them.
Bake in a preheated oven at 180°C (356°F) for 15 minutes.
Let them cool to finish.