Wash the chicken schnitzel and pat dry. Cut thicker pieces thinner with a butterfly cut and enlarge them. Then place the schnitzel between cling film or a freezer bag.
Season the schnitzel with pepper and salt from the mill. Mix the ground hazelnuts with the breadcrumbs. Whisk the eggs. Build a breading line from flour, beaten egg and hazelnut breadcrumbs. First turn the schnitzel in flour and knock them off, then turn in egg and finally in hazelnut breadcrumbs.
Heat up a pan with the clarified butter and fry the schnitzel in it all around until golden. Arrange and serve.