Sift the flour once. Microwave the margarine for about 20 seconds, and mix well with a whisk.

Add sugar to Step 1, and mix. Add egg yolk, and mix some more.

Sift in the flour (for the second time) to Step 2, and fold in with a spatula.

When the mixture is no longer floury, cover with plastic wrap, and let it sit in the fridge for at least 30 minutes.

Before cutting out the shapes, preheat the oven for 170℃ (340℉).

Cut out stars, place on a baking sheet lined with a parchment paper, and bake for 20 minutes at 170℃ (340℉).

When you bake the second batch, the oven is already hot, so bake for 5 minutes less.

Decorate with powdered sugar and dragées, and you're done! If you are outlining the cookies along the outer edges with a chocolate writing pen, it's better to do it before stacking them.