The most storied salted egg in Chinese culinary literature: cured in the ancient Gaoyou fashion, the yolk emerges blazing saffron-orange, sandy-textured and seeping visible oil — proof of the Gaoyou Lake district's rich ecosystem and the Gaoyou mallard duck's extraordinary biology.
Historical records of salted duck eggs in the Gaoyou area date to the Northern Wei dynasty, recorded in the agricultural text Qimin Yaoshu. The Song-dynasty poet Qin Shaoyou, a Gaoyou native, gifted them to Su Dongpo. The Qing gourmet Yuan Mei singled them out in his Random Notes on Cookery: 'For salted eggs, Gaoyou is finest — the colour is fine and the oil is plentiful.' Commercial production began in 1905 with the founding of the Yuyuan Egg Factory; double-yolk eggs won international recognition at the 1909 Nanyang Industrial Expo and were exported to the United States, Japan and Southeast Asia from 1910. Wang Zengqi's 1981 essay on Gaoyou duck eggs, required reading in Chinese middle schools, made the egg a national emblem of the city.
Crack the hard-boiled shell to find snowy white and a blazing saffron yolk that seeps oil at the knife — grainy, intensely savoury, faintly briny, with a richness no chicken egg can match.
Double yolks form because Gaoyou ducks, fattened on shrimp, fish and aquatic plants in the lake district, ovulate in rapid succession. Yolk colour comes from carotenoids — astaxanthin and lutein — concentrated in yolk lipids from the diet. During curing, the osmotic gradient pulls salt from the albumen into the yolk; the high-salinity environment denatures phospholipoprotein, causing free fats to separate out and yield the sandy, oily texture after around 40 days. The optimal curing window is 40–50 days at about 25°C; under-cured yolks remain wet and pale, over-cured whites become rubbery.
Variations
Traditional yellow-mud curing packs eggs in a mixture of yellow clay, plant ash and salt, producing a deeper-flavoured, less-salty result with a longer shelf life; modern factory production uses saturated brine immersion over 40 days, faster but yielding a slightly wetter yolk. A plant-ash variant adds a faint woodsmoke note. Double-yolk eggs, naturally rare, remain the most prized gift format.
On the Palate
Where 高邮咸鸭蛋 sits in the Chinese flavor cloud
Ingredients
Serves 4How it's made
7 steps · 20 min
- 110 min
Select fresh Gaoyou duck eggs laid within 24 hours; scrub the shells clean under running water; air-dry completely.
- 25 min
Dissolve sea salt in water at approximately 200g per litre to make a saturated brine; add Shaoxing wine and five-spice powder; stir until fully dissolved.
- 35 min
Place eggs gently into a ceramic crock; pour brine over to submerge all eggs; seal the top with plastic wrap or a fitted lid.
- 457600 min
Cure at room temperature around 25°C for 40–50 days; at the 40-day mark remove one egg, hard-boil and halve it to check — the yolk should be deep orange-red, sandy and visibly oily; continue curing if still pale and wet.
Watch outAt day forty, boil one test egg and split it — the yolk should sit deep orange-red, sandy and beading oil; if it's still pale and wet, give the crock more time.
- 515 min
When ready, remove eggs from the brine; rinse under water; lower into cold water, bring to a boil and simmer for 12 minutes; transfer to cold water to stop cooking.
- 65 min
Halve each egg lengthwise; the yolk should be deep orange-red, sandy in texture and glistening with free-running oil at the cut surface.
Watch outA finished yolk splits deep orange-red, crumbly-sandy, with free oil welling up at the cut face — that oil ring is the sign the cure hit its mark.
- 72 min
Serve at room temperature alongside congee, steamed buns or mantou; or separate the cured yolks for use in mooncake, rice dumpling or pastry fillings.
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