In a large mixing bowl, combine flour, cornmeal, baking powder, salt, and cardamom. In the bowl of your stand mixer, combine sugar and eggs until thoroughly combined. Add in vanilla and then flour mixture. If dough doesn't come together easily, add up to one tablespoon water. Stir in hazelnuts. Let dough stand five minutes.

With moist hands, divide the dough in half. Form into two equal mounds (about one-inch high). With wet hands, pat the top of the mounds. Sprinkle with sugar.

Bake for thirty minutes until lightly browned. Cool for five minutes.

Let cool completely.