In a food processor, finely grind the remaining 1/2 cup of hazelnuts with 2 tablespoons of the sugar. Add the flour, cinnamon, allspice, cloves, salt and the remaining 1/2 cup plus 2 tablespoons of sugar and pulse to combine. Add 2 sticks of the butter and pulse until a dough forms. Transfer the dough to a work surface and knead 2 or 3 times. Pat the dough into two 8-inch disks, wrap in plastic and chill until firm, at least 30 minutes.