Separate eggs. Beat the egg yolks and 60 g sugar with the whisks of the mixer until light creamy. Add milk while stirring. Add orange liqueur to taste, orange and lemon peel. Stir in flour.
Leave to soak for about 10 minutes.
Beat the egg whites until very stiff and allow 40 g sugar to trickle in. Fold the beaten egg whites into the dough.
Heat half the butter in a large frying pan. Add half of the dough and bake at medium heat from the bottom side until golden brown. Turn over with the help of a large pallet, allow to rise briefly. Pick the dough into pieces with two forks and fry them all around until golden brown.
Keep warm in the oven (at 50 °C). Bake another piece of junk with the rest of the dough.
Dust Kaiserschmarrn with icing sugar. You can serve it with cranberry compote (glass), apple compote or red fruit jelly.