Condiments

Vegan substitute for Fish sauce

Key facts

Replaces
Fish sauce
Category
Condiments
Options here
4 tested swaps
Easiest swap
Kombu soy sauce — 1:1

Options, ratios and best uses

Kombu soy sauce

1:1

Simmer kombu in soy with sugar, cool and strain.

Best for: curries, dressings, dips

Vegan fish sauce

1:1

Pineapple or seaweed based; widely available now.

Best for: anything

Miso + lime

1 tsp miso + 1 tsp lime per tbsp

Whisk into liquid before adding.

Best for: dressings

Mushroom seasoning

1 tsp per tbsp

Very salty — adjust other salt down.

Best for: stir-fries, broths

Tips

  • Add a pinch of sugar to mimic the sweetness
  • Dried shiitake stock deepens the umami
  • Season at the end so salt doesn't concentrate

Avoid

  • Using dark soy sauce alone — too bitter
  • Forgetting curry pastes may already contain shrimp

Questions people ask

Does vegan fish sauce taste the same?

Very close in cooked dishes; side by side raw, it is slightly less pungent.

What about oyster sauce?

Mushroom "oyster" sauce is a direct 1:1 substitute.

Related swaps

Reviewed 2026-09-17 by the Veg.ac editorial team · Free to reuse under CC BY 4.0 with a link back.

Go deeper

What you are actually replacing

Swapping Fish sauce well is a food-science problem before it is a shopping problem. The original ingredient is doing a specific job — binding, aerating, browning, adding fat, adding salt or adding structure — and the best replacement is the one that does that same job, not the one that sounds closest on the label. Once you can name the job, the choice between Kombu soy sauce, Vegan fish sauce, Miso + lime, Mushroom seasoning becomes obvious.

How to choose between the options

  • Start from the dish, not the product. A swap that is perfect in a cake can be wrong in a sauce.
  • Match fat and water content first; texture failures are usually a moisture problem, not a flavour one.
  • Season and taste at the same point in the recipe where you would have tasted the original.
  • Expect the first attempt to be about eighty per cent right, and adjust one variable at a time.
  • Keep one reliable default in the cupboard so the swap is never a reason to abandon a recipe.

More questions people ask

What is the closest all-round replacement for Fish sauce?

There is rarely one universal answer, which is why the table above splits by use. For everyday cooking, pick the option listed as best for the dish type you cook most often and keep it as your default; use the others when the recipe depends on a property your default lacks.

Will anyone notice the difference?

In mixed dishes — sauces, bakes, stews, doughs — almost never once the seasoning is adjusted. In dishes where the original ingredient is the entire point and eaten plain, the difference is more noticeable, so it is worth choosing the highest-quality option there.

Do these swaps cost more than Fish sauce?

Whole-food options are usually cheaper; branded processed replacements are usually more expensive. Cooking from the cheaper end most of the time and keeping the branded product for convenience meals keeps the weekly cost roughly flat or lower.

Are these replacements nutritionally equivalent?

Not identical, and that is fine. Some are lower in saturated fat, some are higher in fibre, some are fortified. Judge the swap by the whole day's eating rather than a single line on the label, and check fortification if the original was a main source of a nutrient for you.

Keep exploring

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