Soy sauce is one of cooking's great umami drivers. Here's how to replace it — whether you're out, avoiding soy, managing sodium, or cooking gluten-free.
Soy sauce is one of the world's oldest condiments, with origins in China dating back over 2,500 years. It is made by fermenting soybeans (and typically wheat) with salt and water using specific mold cultures (Aspergillus), then aging the resulting liquid for months or years. The fermentation process produces the distinctive salty, savoury, umami-rich flavour that makes it indispensable in Asian cooking.
Chinese soy sauce, Japanese soy sauce (shoyu), Korean soy sauce (ganjang), and Indonesian kecap manis are all distinct regional varieties with different fermentation processes, flavour profiles, and uses. Standard Western supermarket soy sauce is typically modelled on Chinese-style light soy sauce.
The key flavour compound is glutamic acid — one of the primary drivers of umami — which is produced during fermentation. This is why soy sauce functions as a salt replacement with significantly more flavour depth than table salt alone.
Soy sauce serves three functions: it seasons (salt), it deepens (umami), and it colours (brown). This combination is why it is used in marinades, braises, stir-fries, dipping sauces, and dressings across dozens of cuisines. A dish seasoned with soy sauce tastes fundamentally different from one seasoned with plain salt — more complex, rounder, and more satisfying.
Light soy sauce (the most common variety) is saltier and more liquid. Dark soy sauce is thicker, less salty, sweeter, and adds significant colour to dishes. Sweet soy sauce (kecap manis) is syrupy and used for glazing and noodle dishes.
Buying: Look for naturally brewed soy sauce — the ingredients should be soybeans, wheat, water, and salt. Avoid "hydrolysed soy protein" sauces, which are chemically produced and significantly inferior in flavour. Kikkoman (Japanese), Pearl River Bridge (Chinese), and San-J (for tamari) are reliable brands.
Storing: Soy sauce keeps well at room temperature when unopened. After opening, refrigerating it preserves the best flavour, though it remains safe at room temperature for months.
Tamari is Japanese-style soy sauce made with little or no wheat. The result is a slightly richer, less salty, more rounded flavour compared to standard soy sauce. It is the best gluten-free substitute and is also preferred by many cooks for its fuller flavour. Check labels — some tamari contains small amounts of wheat.
Made from the fermented sap of coconut palms, coconut aminos is the go-to substitute for those avoiding soy. It is less salty and slightly sweeter than soy sauce, with about 73% less sodium. In most dishes a 1:1 substitution works, though a small pinch of additional salt helps close the flavour gap. It does not taste of coconut.
Fish sauce provides intense umami through a different mechanism — fermented fish proteins — and is saltier and more pungent than soy sauce. It is not a flavour match but serves the same functional role of adding deep savoury complexity. Use it sparingly as a substitute. Not appropriate for vegan cooking.
Bragg Liquid Aminos is made from non-fermented soybeans and has a similar flavour to soy sauce with lower sodium content. It contains both essential and non-essential amino acids. The flavour is slightly milder and less complex than naturally brewed soy sauce but works well in most applications.
Worcestershire sauce provides umami (through anchovies, tamarind, and fermented ingredients) alongside sweetness, acidity, and spice. It is more complex than soy sauce and has a distinct flavour profile. Works best in dishes where soy sauce is a supporting role rather than a lead flavour — marinades, burgers, stews.
Gluten-free: Tamari (check label), coconut aminos, and Bragg Liquid Aminos are gluten-free. Standard soy sauce contains wheat.
Soy-free: Coconut Aminos is soy-free. All others contain soy.
Vegan: Tamari, coconut aminos, and liquid aminos are vegan. Fish sauce and traditional Worcestershire sauce are not.
Low-sodium: Coconut aminos (73% less sodium) and Bragg Liquid Aminos are lower-sodium options. Low-sodium soy sauce is also available.