Egg Drop Soup

01

Egg flowers in broth

Egg drop soup is named for what the egg does: poured into hot broth, it opens into “flowers.”

The Chinese name is plain description. 蛋花 means “egg flowers,” the soft petals and threads that form when beaten egg meets hot liquid, and 汤 is soup. There is no fixed recipe beyond that. The broth may be stock or simply boiled water seasoned in the bowl; the egg may be one or two for a whole family; and what goes with it depends on the season and the cupboard.

Fuchsia Dunlop describes the place of soup at a Chinese meal as the equivalent of a glass of water or wine at a Western one, and pictures a light vegetable soup in which, freed from gravity, clusters of greens, slices of tomato and wisps of golden egg float like a three-dimensional abstract painting. Egg drop soup is the humblest version of that idea: two eggs make a whole basin of it for about two yuan. It is the soup of school canteens, quick weekday dinners and the end of a cheap restaurant meal, which is also why few people think of it as a dish at all.

Sources [5][10]

02

The one thing to get right

Good egg flowers depend on the temperature of the broth at the moment the egg goes in.

If the broth is boiling hard, the egg seizes into small tough curds; if it is too cool, the egg clouds the soup. Cooks agree on the fix even when they differ on details. The usual method is to bring the water to the boil, turn the heat to its lowest or off, wait until the bubbling stops and only then pour in the egg. Then they pour slowly in a circle, push the soup gently in one direction rather than stirring, and do not let it boil again, because that turns the flowers hard.

Two smaller tricks are common. A spoonful of starch slurry beaten into the egg makes the flowers tender and keeps them from sinking, and a drop of white vinegar takes away any eggy smell. In Dongbei, where the soup is called 甩袖汤, “sleeve-flicking soup,” the aim is egg flowers that are big and thin.

Sources [10][11][13]

03

Why a pot off the boil still cooks the egg

Egg sets at a far lower temperature than most cooks expect.

Harold McGee gives the numbers: egg white begins to thicken at about 63°C and is a tender solid at 65°C, yolk thickens at 65°C and sets at 70°C, and the two beaten together set at around 73°C. Broth that has just stopped boiling is still far hotter than that, so turning off the heat costs nothing. The egg sets in seconds, and the calm surface lets the threads spread instead of being torn apart. Starch helps for a chemical reason too: dissolved in the egg, it gets between the proteins and keeps them from clenching into hard curds.

America’s Test Kitchen gets there another way: it stirs the starch into the pot rather than the egg, using 2 tablespoons of cornstarch for 2 quarts of stock, because in a thin broth the ribbons sink. The egg goes in over almost a minute, then sits undisturbed for 30 to 60 seconds. Starch thickening also weakens if simmered for long, which is one reason this soup is made at the last moment and cannot be kept hot.

Sources [6][9]

04

The egg drop soups of China

Almost anything can be paired with egg flowers, but a handful of versions are eaten everywhere.

The commonest is seaweed and egg, 紫菜蛋花汤: dried laver, tiny dried shrimp, scallion and coriander, salt, white pepper and sesame oil put into the serving bowl, the egg flowers poured over. Tomato and egg soup is just as universal, the soup counterpart of tomato and egg stir-fry, with the tomato simmered first so the broth turns pink and slightly sweet-sour.

Sources [1][2][3][4][5][10][12][13]

05

Egg flowers in older kitchens

Writers who remember Republican-era restaurants mention egg flowers as the light touch at the end of a meal.

Tang Lusun found the soups of Shanghai’s local restaurants either the pork-and-bamboo yanduxian or a shredded-pork broth, both heavy and oily. A diner who knew how to eat, Tang advised, would finish a meal of fish and meat with a goji and egg drop soup, or an amaranth soup with wine lees, “light and refreshing, all the grease gone.” In Beijing, Tang remembered egg flowers in a different role: the meat-slice sauce ladled over breakfast tofu pudding was pork stock with day lilies, wood ear and egg flowers, thickened with starch, and the whole skill was in the thickening, because too thick stuck to the tongue and too thin turned to soup.

Zhou Songfang quotes a Republican-era guide to Shanghai that sent anyone wanting Tianjin food to Qingpingyuan or Liuheju, where the most famous dish was 果儿汤, shredded pork cooked in egg drop soup, “not bad, and cheap, under two jiao.” In Kunming, Wang Zengqi remembered Kuiguangge on Zhengyi Road, which sold no rice dishes, only noodles and pastries: scallion pancakes fried in lard, guotie, and pianr tang of shredded cabbage, egg flowers and torn pieces of dough.

Sources [1][2][3]

06

An old method, a newly cheap egg

Nobody can date the first egg drop soup, but its logic is easy to see.

Cooking egg in boiling water is very old in China. The sixth-century Qimin Yaoshu’s method for poached egg was to break the egg into boiling water, lift it out as soon as it floated and season it with salt and vinegar. No early text describes egg drop soup by name.

What the soup does is easier to explain. For most of Chinese history, eggs from backyard hens were saved for the sick, the old and children, and only became cheap and plentiful in the 1980s. Beating one or two eggs into a whole pot of soup spreads them across a family: the flowers look generous, every bowl gets some, and the soup still tastes of egg. That thrift is still visible in a recipe that makes a basin from two eggs.

Sources [7][10]

07

Egg drop soup on American menus

In the United States, egg drop soup became a fixture of Chinese restaurant menus early in the twentieth century.

The food etymologist Barry Popik has collected the American record. “Consomme Egg Drop” appears on a Pennsylvania hotel’s dinner menu in 1903, a reminder that Americans dropped egg into soup in their own way too, and a 1914 New York cookbook drops a batter of flour and egg into boiling stock. The Chinese soup is clearly on the menu by the 1930s: a 1934 New York restaurant guide recommends the 65-cent dinner at Hang Far Low, 23 Pell Street, starting with mushroom and chicken soup with egg drop. A 1936 book about New York’s Chinatown lists a tomato soup with eggs as “Fan-kia-don-far-tong,” which is 番茄蛋花汤 in Cantonese. A Reno menu of 1946 offers “Dan Far Tong, egg flower, 15c.”

The thick American version took shape later. A 1961 Dallas newspaper recipe makes “egg flower” soup quickly from a packet of dehydrated chicken noodle soup, a little cornstarch paste and a beaten egg. Popik’s notes add that in China the soup is thinner than its Western counterpart. Today the takeout bowl, glossy with cornstarch, remains one of the main soups on American Chinese menus.

Sources [8]

08

Making seaweed and egg drop soup

This takes five minutes, and most of it is waiting for the water to boil.

The seasonings go into the serving bowl first and the egg flowers are poured over them, so the seaweed stays fresh and nothing overcooks.

Sources [10][11]

09

The free soup

For many Chinese students, egg drop soup is the soup that costs nothing.

In school canteens a tub of seaweed and egg soup is often free, and that is how a lot of people remember it: thin, pale and tasting of hot water, with a few freeze-dried blocks stretched across a whole tub. Tomato and egg turned up less often and felt like a small promotion. One nickname for it among students is 国际汤, “international soup,” short for “soup by international convention,” because it was always there.

The same soup now comes in packets. An 8 g freeze-dried cake of egg, laver, starch, salt and chicken seasoning needs only 260 ml of hot water and cost 1.5 yuan online in 2024. It carries more egg than most people’s canteen version did, which is part of the joke when former students taste it again.

Sources [14]

10

What it costs

Egg drop soup has always been the cheapest line on the menu.

Two eggs and a sheet of laver still make a basin of it at home for about two yuan; in 1946 a Chinese restaurant in Reno charged 15 cents a bowl.

Sources [3][8][10]

11

More on the atlas

Other soups and egg dishes.