Serious Eats: Recipes
Salted Duck Eggs
Domestically produced raw salted duck eggs are difficult to find, and imported ones are not available in the US. Cooked salted duck eggs, whole or yolk only, are widely available for purchase at Asian grocery stores and can be used as a substitute. For best results, make your own raw salted duck eggs at home by following the steps below.
Make three to four weeks prior to assembling the joong (learn more about joong here). Eggs are ready to use when the yolk is firm. Test an egg after three weeks. If the yolk doesn't hold a spherical shape, allow to brine for one more week.