Seafood
Vegan alternative to fish sauce: the best substitutes
Everything you need to replace fish sauce with a plant-based substitute — which one to use, the exact ratio, and the mistakes that ruin the result.
Short answer
Key takeaways
- Best all-round swap: Soy sauce + lime + a pinch of sugar (everyday substitute).
- Ratio: 1:1.
- Pro tip: A strip of kombu simmered in soy sauce for 10 minutes gives the marine note most swaps miss.
- 3 vegan alternatives to compare for fish sauce.
Why fish sauce isn't vegan
Fermented anchovies.
Best vegan substitutes
| Substitute | Best for |
|---|---|
| Soy sauce + lime + a pinch of sugar | Everyday substitute |
| Vegan fish sauce (seaweed-fermented) | Closest match for Thai and Viet food |
| Miso + kombu broth | Deep umami without salt overload |
How to substitute fish sauce, step by step
- 1
Pick the right substitute for the job
For most recipes use Soy sauce + lime + a pinch of sugar — everyday substitute. If you need a different texture, Vegan fish sauce (seaweed-fermented) works for closest match for thai and viet food.
- 2
Measure using the correct ratio
1:1. Weigh rather than eyeball it — small errors show up much faster when replacing fish sauce.
- 3
Adjust the method
A strip of kombu simmered in soy sauce for 10 minutes gives the marine note most swaps miss.
- 4
Taste and correct
Plant swaps are usually a little less salty and less rich than fish sauce. Season at the end and add acid (lemon, vinegar) or umami (miso, nutritional yeast) if the dish tastes flat.
Mistakes to avoid
- Swapping by volume when the recipe measures fish sauce by weight — check the ratio above first.
- Using a sweetened or flavoured version in a savoury recipe.
- Ignoring the method change: A strip of kombu simmered in soy sauce for 10 minutes gives the marine note most swaps miss.
- Assuming every packaged product labelled "plant-based" is vegan — some still contain milk powder, honey or egg. Scan the barcode to be sure.
Conversion ratio
1:1.
Pro tip
A strip of kombu simmered in soy sauce for 10 minutes gives the marine note most swaps miss.
Replace the job, not just the ingredient
An egg can bind a burger, enrich a cake or create the foam in a meringue. Those jobs need different substitutes: ground flaxseed can help with binding, while aquafaba is useful for whipping.
Review the rewritten method as well as the ingredient list. Changing the amount of liquid, the cooking temperature or the resting time can matter as much as the substitute itself.
- A practical example
- For a creamy pasta, try unsweetened plant cream or blended silken tofu; add acidity and seasoning to taste rather than relying on a cheese substitute alone.
- What to keep in mind
- Substitutions can change allergens, texture and nutrition. Test a small batch before making a dish for guests.
Frequently asked questions
- What is the best vegan alternative to fish sauce?
- Soy sauce + lime + a pinch of sugar is the closest all-round swap — everyday substitute. 1:1.
- Why isn't fish sauce vegan?
- Fermented anchovies.
- How much do I use instead of fish sauce?
- 1:1.
- Any tips for getting it right?
- A strip of kombu simmered in soy sauce for 10 minutes gives the marine note most swaps miss.
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