Whip the egg yolks with the caster sugar 1 in a planetary mixer.
Mix the egg whites with the powdered egg whites and whip them with the sugar 2.
Mix the yolks with the meringue and incorporate the previously sieved powders.
Recover 910 g of dough (this is the dose for a 60x40 baking tray), and spread it evenly with a spatula.
Bake at 200 °C for 14 minutes (first 3 minutes with the valve closed, then open).
Once cold, cup the biscuit with a circle mould.