A light soup featuring duck eggs, greens, and a savory broth, perfect for a refreshing meal.
A bữa cơm gia đình (family meal) staple across all three regions of Vietnam, on the table since duck farming spread through the Mekong delta in the 19th century. Duck eggs were the cheap protein of paddy households — ducks ate the rice-field snails for free. The clear-soup course (canh) is the Vietnamese answer to the Chinese rice-meal soup, leaner and herb-led.
Hue's duck-egg-and-pickled-mustard-green soup — fertilized duck egg simmered in a sour broth with mustard greens (cai chua) and ginger. Postpartum food in central Vietnam, eaten for warmth and recovery.
A clear broth, faintly yellow, with ribbons of duck egg drifting through and a handful of green — usually rau ngót (katuk leaf) or chopped scallion. The egg is poured in a thin stream into simmering stock so it sets in shreds, not curds. Eaten alongside rice and a salty main; the soup is the rinse course, not the centerpiece.
Duck egg has more fat and a stronger sulfur note than chicken egg — it carries flavor in a thin broth where chicken egg would taste flat. The pour technique matters: stock at a low simmer, egg through chopsticks or a fine stream, no stirring for ten seconds so the threads can set. Stir too soon and you get cloudy soup with grainy curds.
Variations
Hue traditional (with hot vit lon, fertilized duck egg); home version uses regular duck egg; canh trung vit cai chua adds extra mustard greens; northern variant skips ginger and uses tamarind for sour.
On the Palate
Where Canh Trung Vit sits in the Vietnamese flavor cloud
Ingredients
How it's made
3 steps · 10 min
- 15 min
In a pot, bring the chicken stock to a gentle simmer over medium heat. Add thinly sliced ginger and shallot, allowing the flavors to infuse for about 5 minutes.
Watch outKeep it at a lazy simmer with just a few bubbles breaking — a full boil here will wreck the egg in the next step.
- 23 min
Crack the duck eggs into a bowl and beat lightly. Slowly pour the eggs into the simmering stock, stirring gently to create ribbons.
Watch outStream the egg thin and slow, then count to ten before touching it so the ribbons can set.
- 32 min
Add the spinach and fish sauce to the pot, stirring until the spinach is wilted and the soup is heated through.
Watch outDrop the greens in at the very end and pull the pot as soon as they wilt, or they'll go dull and slimy.
