In a bowl, soften the butter and mix until smooth. Add sugar and mix thoroughly.

Add the egg yolk and mix well.

Sift the cake flour and parmesan cheese powder into the bowl. Add parsley powder directly.

Use a spatula to mix gently until crumbly, then form into a dough ball.

Wrap the dough in plastic wrap and refrigerate for 30 minutes.

Roll the dough to 0.5cm thickness and cut into desired shapes using cookie cutters or a knife.