Soft almond cookies from Siena with a chewy center and powdered sugar coating are elegant. These prized mediterranean sweets are a family tradition during Christmas.
Preheat the oven to 300°F and line a baking sheet with parchment paper.
In a medium bowl, combine blanched almond flour, lemon zest, and salt. Mix well.
Beat egg whites in a clean bowl until soft peaks form, then gradually fold in the sugar and vanilla extract until glossy.
Gently incorporate the almond flour mixture into the egg whites, mixing just until a sticky dough forms — do not overmix.
Shape spoonfuls of dough into oval cookies, roll in powdered sugar, and arrange them on the prepared sheet spaced apart. Bake for 22–25 minutes until just firm outside but still moist and chewy inside.
Cool on the tray, then dust with extra powdered sugar before serving.