Oyster Sauce: Flavor, Production, Substitutes and Uses
Oyster sauce is a thick, dark brown seasoning sauce from southern Chinese cooking. It is made from reduced oyster extract, sugar, salt and starch, and it gives wok dishes, noodles and vegetables a deep, salty-sweet umami flavor.
Fact sheet
- Also known as
- Oyster Sauce, Austernsoße, 蚝油 (háoyóu), kantonesisch ho yau
- Origin
- Südchina, Provinz Guangdong
- Taste
- salzig, leicht süß, kräftiges Umami, kaum fischig
- Substitute
- vegetarische Austernsauce (Pilzbasis) 1:1, Sojasauce mit Zucker und etwas Stärke, Hoisin- und Sojasauce zu gleichen Teilen
- Storage
- ungeöffnet im Vorratsschrank, nach dem Öffnen im Kühlschrank mehrere Monate
- Where to buy
- Asialaden, Asia-Regal im Supermarkt, online
What Does Oyster Sauce Taste Like?
Straight from the spoon it tastes salty, slightly sweet and barely of fish. The flavor of the sea stays in the background. In a finished dish you rarely pick it out as a separate note: it rounds things off, makes sauces shine and thickens them a little because it contains starch.
Next to soy sauce, it is milder in salt, thicker and sweeter. Fish sauce, by contrast, is thin and smells strong. You cannot swap the two one to one.
Origin and Production
Oyster sauce, 蚝油 (háoyóu) in Chinese, comes from Guangdong province in southern China. The best-known story tells of a cook at a food stall who left an oyster broth on the fire too long at the end of the 19th century. What remained was a thick, brown, aromatic paste, which he sold as a seasoning.
To make the extract, producers boil oysters in water and reduce the liquid until it is concentrated. Sugar, salt and cornstarch are added, and many bottles also contain MSG as a flavor enhancer and caramel color for the color. Some varieties contain soy sauce or wheat flour.
How much oyster extract is in the bottle varies a lot from product to product. Read the ingredient list: if the extract comes first, the sauce tastes rounder, with less sugar and salt.
Varieties on the Market
- Classic oyster sauce: made with oyster extract, dark brown and thick. The standard choice for wok dishes.
- Premium varieties: more extract, fewer additives, usually smaller bottles at a higher price. They are worth it if you drizzle the sauce straight over vegetables.
- Vegetarian oyster sauce: often sold as mushroom sauce or "vegetarian stir-fry sauce", based on shiitake or other mushrooms. It tastes similarly savory and contains no mollusks.
Using It in the Kitchen
Add oyster sauce to the wok toward the end. It contains sugar and burns quickly over high heat. One to two tablespoons are enough for a pan for two people.
- Wok dishes with meat: Sear the meat hard, add the vegetables, then stir in oyster sauce with a little soy sauce and a splash of water. This is how the wok-fried beef with oyster sauce works, and the fried pork slices with salad too.
- Noodles and rice: In chao mian, fried noodles with chicken and vegetables or Yangzhou fried rice, a spoonful of oyster sauce adds color and depth.
- Leafy greens: A classic of Cantonese cooking is blanched Chinese broccoli (gai lan) or bok choy, drizzled with oyster sauce and hot garlic oil.
- Marinades: Mix oyster sauce with soy sauce, rice wine and a little starch and marinate strips of meat in it before you fry them. The starch helps the marinade cling to the meat.
Chop suey and wok vegetables with eggs and glass noodles can also take a spoonful. If you combine it with soy sauce, add salt only at the very end, because both bring plenty of salt. Which soy sauce suits which dish is explained in the article light and dark soy sauce.
Substitutes for Oyster Sauce
No product tastes exactly the same. For most wok dishes, these options work:
- Vegetarian oyster sauce at a ratio of 1:1. The closest to the original.
- Soy sauce with sugar: 1 tbsp soy sauce, ½ tsp sugar and a little starch stirred into water replace about 1 tbsp oyster sauce.
- Hoisin sauce with soy sauce in equal parts. The result tastes sweeter and spicier but goes well with pork.
- Soy sauce with a few drops of fish sauce, if you miss the flavor of the sea.
Allergens and Nutrition
Classic oyster sauce contains oysters. They count as mollusks, one of the 14 major allergens that manufacturers in the EU must label. Many varieties also contain wheat (gluten) and soy. If you cook gluten-free, look specifically for bottles with no wheat in the ingredient list. For vegetarian and vegan dishes, use the mushroom version. Expect plenty of salt in every variety.
Buying and Storing
You can buy oyster sauce at any Asian grocery store, in the Asian aisle of well-stocked supermarkets and online. At an Asian grocery store you will usually find several qualities side by side. Compare the ingredient lists there, because the price alone says little.
Unopened, it keeps in the pantry until the best-before date. After opening, put it in the fridge, where it stays good for several months. Wipe the bottle neck after pouring, otherwise the cap gets sticky and mold can easily form on the rim. If the sauce smells sour or you see mold, throw it away.