Fish sauce is a potent, savory condiment essential in many Southeast Asian cuisines. Known for its bold umami taste and distinctive aroma, fish sauce adds depth to a wide range of dishes. This article covers everything about fish sauce—from its origins to how to store and shop for it.
Fish sauce is a fermented liquid made by layering fish (typically anchovies) and salt, which are left to ferment for several months or even years. It’s a key ingredient in Thai, Vietnamese, Filipino, and Cambodian cooking, bringing umami and salty complexity to marinades, soups, and stir-fries.
Fish and salt are combined in large barrels, where enzymes naturally break down the fish over time. The fermentation process can take anywhere from 6 months to 3 years. Once ready, the liquid is pressed and filtered, producing a reddish-brown sauce. Higher-quality fish sauces use only fish and salt, while cheaper versions may contain added sugar or flavor enhancers.
Fish sauce has a salty, umami-rich taste with a touch of sweetness. Though its smell is intense, its flavor mellows when used in cooking, adding depth and enhancing other ingredients.
Fish sauce has been used for centuries in Southeast Asia, where each region has its own variations. In Vietnam, it is a crucial element in nuoc cham, a versatile dipping sauce. In Thailand, it features prominently in pad thai and green curry. Fish sauce is not just for cooking—it holds cultural significance and is often used in religious offerings and ceremonies.
A 250-ml bottle of fish sauce usually costs £4–£10 / $5–$12, with premium brands being more expensive.
Yes, most fish sauces are gluten-free, but always check labels to ensure there is no added wheat.
The smell can be strong, but it mellows during cooking and adds a savory depth to dishes.
When stored in the fridge, fish sauce can maintain its quality for up to two years.
No, as fish sauce contains fermented fish. Look for alternatives like soy sauce or coconut aminos.
Thai fish sauce tends to be a bit sweeter, while Vietnamese fish sauce (nuoc mam) is typically purer, using only fish and salt.