For hazelnut balls, beat egg whites until stiff. Mix granulated sugar with cornstarch and cinnamon, add mixture to snow and beat until mixture begins to shine. Pour about 80 g into a piping bag with a star nozzle and set aside.
Stir the grated hazelnuts into the remaining snow mixture. With wet hands, form small balls (about 1 tsp each), place on the baking sheet lined with parchment paper and flatten slightly. The mixture is very sticky – so you can only work it well with wet hands!
Place a dab of the snow mixture in the center of the slightly flattened balls and press a hazelnut on top. Preheat the oven to 110 °C hot air. Bake the cookies for about 30 minutes.
After cooling, store the hazelnut balls in a dry place or eat them immediately.
Preparation Tip:
Hazelnut balls can of course be prepared with any other nuts.