How to Make It
Preheat the oven to 350°. Line a baking sheet with parchment paper. In the bowl of a standing mixer fitted with a paddle, combine the flour with the 1 cup of granulated sugar, almonds, baking powder, anise seeds, lemon zest and salt. Add the whole eggs, egg yolks and vin santo and beat at low speed until a stiff, crumbly, slightly sticky dough forms.
Turn the dough onto a lightly floured work surface and knead it 2 or 3 times, until it just comes together. Divide the dough into 3 equal pieces and form each one into a 12-by-1 1/2-inch log. Transfer the logs to the prepared baking sheet. Brush the tops of the logs with the egg white and sprinkle lightly with sugar. Bake the logs in the center of the oven for 25 minutes, or until they are lightly browned and slightly firm. Let the logs cool for 30 minutes on the baking sheet, then transfer them to a cutting board.
Line 2 baking sheets with parchment paper. While the logs are still warm, cut them into 1/3-inch slices with a sharp serrated knife. Arrange the cantucci on the sheets, cut sides down, and bake, turning once, until golden, about 25 minutes.