Light, dry sponge fingers from Piedmont are essential for tiramisù and perfect for dunking. These versatile mediterranean cookies are a family baking staple.
Preheat oven to 350°F and line two baking sheets with parchment; adjust oven racks to upper and lower thirds.
Separate the eggs, then beat yolks with granulated sugar and vanilla extract on medium-high for 4–5 minutes until pale and thick.
In a clean bowl, whip egg whites to soft peaks, gradually increasing speed for maximum volume.
Fold egg whites carefully into the yolk mixture, then sift in cake flour; gently combine to retain fluffiness.
Transfer batter to a piping bag and pipe 4-inch fingers onto prepared sheets, dust with powdered sugar, and bake 10–13 minutes until golden and dry; cool completely before serving or storing.