Preheat the oven to 375°Lightly grease (or line with parchment papetwo baking sheets.
In a large mixing bowl, beat together the butter, granulated and brown sugars, corn syrup, vanilla, Fiori di Sicilia nutmeg, baking powder, baking soda, salt and egg. Stir in the flour.
Place the coarse sugar in a shallow dish. Drop the dough by the tablespoonful into the sugar, rolling the balls to coat them. Place them on the prepared baking sheets two inches apart.
Bake the cookies for 10 minutes, until the edges are just barely beginning to brown; they'll look soft. If you bake these cookies too long, they'll be crunchy, not chewy. Remove them from the oven and cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.