Preheat oven to 350°F.
In a medium bowl, combine the flour, baking powder, cornmeal, salt, and sugar. Stir in the coconut milk and orange and lemon peel until just combined.
Form into balls and roll in sugar, if using. Place dough balls on a greased cookie sheet and bake in oven for 20-24 minutes or until lightly browned. Cool on rack.