Hot and Sour Soup
Also: Suanla tang, Suan la tang
A Chinese broth balanced between sourness from vinegar and heat from white pepper, thickened with starch and filled with tofu, wood-ear mushroom, and egg ribbons.
Identity criteria
- 1Simultaneous sour (vinegar) and hot (white pepper) balance
- 2White pepper, not chili, supplies the defining heat
- 3Starch-thickened to a glossy, slightly viscous body
- 4Egg streamed in to form ribbons
- 5Strips of tofu and wood-ear mushroom for texture
Components
Firm tofu, juliennedessential
Wood-ear mushroomessentialSignature crunch
Bamboo shoots, lily budsoptional
Egg, streamedessentialForms the ribbons
Pork stripsoptional
Black or rice vinegaressentialThe 'sour'; added late to keep it sharp
Pork or chicken stockessentialVegetarian versions use mushroom or vegetable stock
Cornstarch slurryessentialCreates the silky thickened body
Ground white pepperessentialThe 'hot'; defining heat source over chili
Soy sauceoptional
Scallion, sesame oiloptional
Technique
- Starch thickening
- Gives the soup its characteristic glossy, clingy viscosity
- Egg ribboning
- Streaming beaten egg into moving hot soup sets it into delicate threads
- Late vinegar addition
- Vinegar is volatile; adding it at the end preserves the bright sour edge
Form & serving
- Served
- In bowls, often as a starter
- Temperature
- hot
- Portion
- Bowl
- Pairs with
- Dumplings · Spring rolls · Steamed rice · Northern Chinese dishes
Character
Flavour
Texture
Silky, thickened broth with crunchy mushroom and soft egg ribbons
Eaten
An everyday Chinese soup eaten as a warming, palate-waking starter or light meal across China and abroad.
When
winter · year-round
Variations & related
Regional variations
- Sichuan-style · Sichuan, China
Hotter and more pungent, may include chili and more pepper
- Americanized hot and sour soup · United States Chinese restaurants
Often darker, sweeter, and thicker than the original
Related dishes
- pairs-with Jiaozi
Often served with dumplings
- sibling Egg drop soup
Shares the egg-ribbon technique
Substitutions
Rice/black vinegar → Lemon juiceadmissible
Lacks the mellow fermented depth; passable in a pinch
White pepper → Chili onlyinadmissible
Removes the defining peppery 'hot'; becomes a chili soup, not hot-and-sour
Wood-ear mushroom → Omit entirelyinadmissible
Loses the signature crunch that defines the texture
Common mistakes
- Using chili as the heat instead of white pepper
- Adding vinegar too early so the sourness boils off
- Over-thickening into a gluey texture
- Stirring vigorously after adding egg so ribbons break into scum
Provenance
A settled Chinese soup with roots commonly traced to Sichuan and northern China, now standard across Chinese cuisine and its diaspora.
References
- 1.Chinese culinary references
- 2.Regional cuisine documentation
Confidence: high