Boxing Golden-Thread Salted Duck Eggs 博兴金丝鸭蛋

Boxing Golden-Thread Salted Duck Eggs (博兴金丝鸭蛋) are associated with Mada Lake (麻大湖) in Boxing County (博兴县), Binzhou (滨州). Their name refers to the oil separating the yolk from the white after curing and cooking, which resembles intertwined golden threads.

Mud curing in a cellar

China Enterprise News describes the method used by Shandong Chenshi Specialty Foods (山东陈氏特产食品有限公司). The producer combines mud from beneath the surface of Yellow River (黄河) shoals with its curing mixture and wraps the eggs in it. The coated eggs cure in a cellar at a constant temperature. They are then washed, dried, inspected against light, graded, bagged, vacuum packed and sterilized.

Soft whites and oily yolks

The same newspaper describes large eggs with smooth green shells and reddish yolks. After processing, the whites are soft and delicate, while the yolks have a sandy texture and release fragrant oil.