Separate the eggs and beat the egg whites until stiff, gradually pouring in the sugar. Then stir in the egg yolks. Carefully fold in the flour, do not mix any more.
Line the baking sheet with parchment paper and do not use a teaspoon to place portions of the dough with a little space on the parchment paper. Bake in a preheated oven at 175 ° C for 15-20 minutes.