Fluffy Florentine sponge cake dusted with powdered sugar and marked with the city's lily emblem. A light Carnival dessert that embodies the festive spirit of Tuscan baking traditions.
Preheat your oven to 350°F (175°C) and line a 9-inch square baking pan with parchment paper for easy unmolding.
In a large mixing bowl, whisk eggs and granulated sugar together until the mixture is very light and fluffy, about 3–4 minutes using a hand mixer.
Add the zest and juice of one orange, milk, vegetable oil, and vanilla extract to the bowl, mixing well after each addition for a silky batter.
Sift together flour, baking powder, and salt; gently fold the dry ingredients into the wet mixture in batches to avoid deflating the batter.
Pour the batter into the prepared pan, spreading evenly. Bake on the center rack for 25–28 minutes, or until the top springs back and a toothpick inserted in the center comes out clean.
Cool the cake in the pan for 10 minutes before transferring it to a rack. Once completely cool, dust generously with powdered sugar and, if desired, use a paper stencil to create the Florentine lily emblem.