Mix all the ingredients, except the icing sugar, putting the whites part of the eggs last in the dough.
Leave the dough to rest for at least an hour.

Then put the icing sugar on a pastry board and with the dough form small rolls that you will cut obliquely to form the Ricciarelli.
Put the parchment paper on a baking sheet, lay the Ricciarelli on them leaving some space between them and bake in the preheated oven at 150 ° for about 18 minutes.