From Unique Flavours and Recipes: The Key Differences Between Oyster and Fish Sauce Posted on 26 November 2025 0 Two of the most widely used condiments in Thai cuisine are oyster sauce and fish sauce. However, many people often confuse the two and can even think they’re the same ingredient. Two of the most widely used condiments in Thai cuisine are oyster sauce and fish sauce. However, many people often confuse the two and can even think they’re the same ingredient. Both offer a unique taste to a recipe, providing a range of different flavours and textures. Thai Food Direct is a Thai supermarket in the Hatfield area, and supplies a vast selection of authentic Thai spices, sauces, and condiments, including oyster sauce and fish sauce. While they both share similarities, they also have their own unique taste, delivering something completely different with every dish. In this blog post, we’ll discuss what oyster and fish sauce are, the key differences between them, and delicious Thai recipes that can be enhanced with each sauce. We'll also address some frequently asked questions people have about oyster and fish sauce when it comes to creating traditional Thai cuisine at home. Oyster Sauce: A Sweet and Savoury Condiment Oyster sauce is a traditional condiment originating from Asia, a classic product commonly used in authentic Thai cuisine. Authentic oyster sauce is made by simmering oysters, which is where the salty undertones originate. The sauce is a dark brown colour and is now commonly made using oyster extracts, sugar, salt, and cornstarch, resulting in a glossy texture. Oyster sauce is used in many delicious Thai recipes, including: Stir-Fried Vegetables: Oyster sauce is a key ingredient in Thai stir-fries, complementing the earthy flavours of wholesome, crunchy vegetables. Pad See Ew: Pad See Ew can be amplified with a splash of oyster sauce, as the sweet and savoury taste coats every noodle. Fried Rice Dishes: With the salty flavour that oyster sauce brings, fried rice dishes are enhanced with the addition of oyster sauce, delivering an authentic flavour to every bite. Fish Sauce: A Salty and Umami Sauce Fish sauce is another fantastic condiment that holds a significant place in Thai cooking. Typically, fish sauce is made using fermented fish, which is later extracted to produce a strong yet umami sauce used in all types of Asian dishes. Fish sauce is widely used in authentic Thai cuisine, as it complements various other flavours while adding a salty depth to each bite. Here are some of the most popular recipes that fish sauce is used for: Traditional Pad Thai: A classic dish, incredibly popular for its nutty and sweet flavour profiles. Fish sauce can provide additional strength, providing that extra punch of flavour. Noodle Soup: Fish sauce is an ideal addition to a Thai noodle soup, easily incorporated within the broth, creating the ideal warming dish for all to enjoy. Thai Green Curry: A staple recipe in Thailand, fish sauce binds brilliantly with the other key ingredients, while remaining one of the primary flavours that stand out in each bite. Oyster Sauce Vs Fish Sauce: What are the Key Differences? While there are several similarities between the two sauces, there are many key differences that those looking to cook Thai food at home may not be aware of. Although they both provide a savoury touch and combine easily with other key condiments within a dish, some differences must be considered when it comes to using them within Thai cooking regimes, such as: Appearance: Oyster sauce has a much thicker consistency than fish sauce. Oyster sauce has a deeper and richer colour, whereas fish sauce is a much thinner and slightly lighter colour. Texture: As fish sauce has a slightly runny texture, other ingredients are likely to absorb it. However, oyster sauce is much better suited for coating ingredients due to its stickier texture. Taste: While they may have overlapping flavour profiles, oyster sauce is much sweeter and less intense compared to fish sauce, which has a stronger, saltier and enhanced umami taste. Use: Both are excellent for Thai food recipes, but in different ways. Oyster sauce is a great option for marinating, glazing, and coating ingredients. In comparison, fish sauce is more suitable for broths and dipping sauces. FAQs: What Customers Want to Know Can you Substitute Oyster Sauce for Fish Sauce? Yes, there are some occasions when one can be substituted for the other, but it is not always the case. For example, instead of adding oyster sauce to a stir-fried noodle dish, you can add a fish sauce along with some soy sauce and sugar for the ideal balance. However, in specific recipes where fish sauce is an absolute must, swapping it for oyster sauce may not work due to its thicker and stickier consistency, failing to bind as easily with the other ingredients. How Do you Store Oyster and Fish Sauce? When it comes to storing oyster sauce and fish sauce at home, they both require similar conditions. If they’re unopened, these can be stored within your kitchen cupboard or pantry. Once these have been opened, they must be stored in the refrigerator, as this helps preserve their freshness and quality taste. This may depend on the specific brand, but it’s always best to check the labels for further information. Can Both Be Used in One Recipe? Absolutely. Dozens of excellent Thai dishes allow for both to be added. As oyster and fish sauce both bring something different to each bite, they can often complement each other, making them the ideal cupboard staple for those who enjoy cooking traditional Thai food at home. Whether you’re looking to create your own stir-fry or following an online recipe, both sauces can help achieve the ultimate balance of salty and sweet flavour. Is Oyster Sauce Vegetarian or Vegan? Traditionally, both of these sauces are made using oysters or fermented fish, making them unsuitable for vegetarians and vegans. While many products on the market are still produced using these key ingredients, there are also alternatives available for individuals who do not consume animal products. At Thai Food Direct, we offer a wide range of delicious oyster and fish sauces, as well as vegetarian and vegan sauce options. Thai Food Direct: The Go-To Thai Supermarket While there are many differences between oyster sauce and fish sauce, they are both incredibly delicious additions and can enhance meals by adding a sweet, salty, and savoury taste. Whether you’re a Thai food lover or looking to broaden your palate, having these two condiments in your kitchen cupboards is key. Looking for authentic Asian food ingredients? Skip the mainstream supermarkets and instead, shop at a Thai supermarket for all the ultimate products that are sure to elevate your cooking regime. If you’re looking for something in particular and require further assistance, please call us at 01462 654780, and we will be happy to help you find what you’re looking for.