Leave the butter at room temperature until soft.
Mix yellow cheese powder and sugar into the butter.
Add the egg and stir well.
Sift cake flour and baking powder in, then mix together.
Add chocolate chips and nuts for Levain cookies and mix evenly.
Shape the dough into balls and place them on an oven tray.
Bake in a preheated oven at 180°C for 12-15 minutes.
Let them cool to finish.