Mix the flour with the yeast dissolved in 150 ml of water and leave it covered in a warm place for a couple of hours. After this time add to the dough: the lard (preferably well softened), the sugar, the vanilla, the orange peel and a pinch of salt.
I recommend to mix everything in a planetary mixer, otherwise, be patient. When everything is well mixed, add the egg yolks, one by one. Assemble the egg whites with a mixer.
Finally, add the egg whites, stirring by hand with a palette knife. Pour the dough in a greased pan covered with baking paper and let it rise for another two hours. Bake the dough in a preheated oven at 180 ° C for 30 minutes.
Let it cool and cover with icing sugar. Don’t forget to design a lily on top with some cocoa powder!
Chiara has written for a Florentine web magazine (Te la do io Firenze - in Italian) the top five bakery shops specialized in Florentine flat cakes