This famous Irish sweet is immortalized in the song “Did you treat your Mary Ann/ to dulse and yellowman/At the Ould Lammas Fair/ in Ballycastle-oh?” (Dulse is chewy seaweed—Mary Ann must have been a cheap date.) It dates back to the 17th century when it was made for the Lammas Fair, held the last Tuesday in August in Ballycastle, County Antrim. You can still find Yellowman at some country fairs, although with Ireland’s thriving confectionery industry, this old-fashioned co