Why are you substituting soy sauce?
What soy sauce contributes:
- Salt contribution (roughly 1 tsp salt per 1 tbsp soy sauce)
- Glutamate-rich umami (among the highest of any condiment)
- Dark colour and Maillard reactivity for browning
- Fermentation acid that brightens overall flavour
Profile: Fermented soybean liquid — 900–1100 mg sodium per tablespoon, high in glutamates, slightly acidic from fermentation, adds deep brown colour.
The 4 Best Soy sauce Substitutes
1. Tamari
Closest substitute in every way: same fermented soybean base, slightly less wheat (or none), slightly thicker and rounder flavour. Most people cannot distinguish it from regular soy sauce in a finished dish.
- Works when: Any dish — it is a like-for-like replacement. Preferred when you need gluten-free.
- Fails when: Rarely fails — only if the recipe specifies usukuchi (light soy sauce) and you need a lighter colour; tamari is darker.
- Adjustment: Use as-is. If substituting usukuchi, use 80% the volume and add a pinch of salt.
2. Coconut aminos
Sweeter and lower in sodium than soy sauce, with a caramel-ish note from coconut. Fermented umami is present but gentler. Coconut Secret is the most widely available brand; Bragg also produces one.
- Works when: Soy-free or Whole30 cooking, dipping sauces, marinades where the slight sweetness adds rather than distracts.
- Fails when: Dishes where soy sauce's sharp savoury edge matters — coconut aminos reads sweeter and the colour is lighter.
- Adjustment: Add a pinch of salt since coconut aminos is lower-sodium. Use more than the recipe calls for to compensate for lower intensity.
3. Fish sauce (diluted)
Very high umami from different amino acids (fish-derived rather than soy-derived). Adds fermentation funk that some dishes benefit from.
- Works when: Stir-fries, noodle sauces, fried rice — dishes where the fish sauce's depth reads as an interesting background note.
- Fails when: Sauces where you want a clean soy flavour, dipping sauces for delicate items (sashimi), or dishes cooked by someone who avoids fish.
- Adjustment: The smell is stronger raw but it cooks down significantly. Always taste after cooking before judging.
4. Worcestershire sauce (Western pantry fallback)
Contains fermented anchovy, tamarind, and spices — high umami but distinctly Western in character. The clove and allspice notes show in simple preparations.
- Works when: Western-context dishes that use soy sauce for umami rather than Japanese character — burgers, stews, meat marinades.
- Fails when: Any Japanese recipe where the dish's integrity depends on soy's clean fermentation note — Worcestershire is too assertive.
- Adjustment: Use in the marinade or early cooking stage so the spice notes mellow before serving.
Frequently Asked Questions
Is tamari gluten-free?
Most tamari is gluten-free or very low-gluten, but not all. Check the label: certified gluten-free tamari (like San-J) has been tested to less than 20 ppm. Standard tamari may still contain trace wheat.
How much salt equals 1 tablespoon of soy sauce?
About ½ to ¾ teaspoon of table salt. This matters when you're completely omitting soy sauce from a recipe — replace the liquid volume with water or stock and add salt to compensate.
Can I use liquid aminos instead of soy sauce?
Bragg Liquid Aminos is a common swap: similar fermented soybean profile, slightly less sodium than regular soy sauce, not fermented in the traditional sense (it's hydrolysed). Use 1:1 — the flavour is close enough in most cooked applications.
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