How to make vegan fish sauce

by Stephanie Weaver on May 22, 2011

How to make vegan fish sauce

If you’re a fan of Thai and southeast Asian food, you know that fish sauce is a key ingredient to many dishes, giving them their unique flavor. Fish sauce, also called nuoc mam or nam pla, is made from fermented fish and salt. I thought it would be interesting to try to come up with a vegan alternative.

My pal Marie from Meandering Eats suggested that the key taste to capture was umami, the savory taste found in soy-based foods.

I took seaweed, soaked it, added miso for the salty umami flavor, and blended it. It has a briny taste that is a pretty reasonable substitute for fish sauce. Note that the final product is not particularly appetizing in color, so you might want to keep this a secret ingredient in your recipes.

Vegan “Fish” Sauce
Makes 1 cup
1/2 oz. (15 g) seaweed sheets (nori or another sheet-style seaweed)
2 T. (30 g) miso paste
1 C. (250 ml) filtered water

Soak the seaweed in the water for 30 minutes. Add the miso and put in a blender. Blend until smooth. Pass through a fine mesh strainer, saving the liquid (toss or compost what is caught by the strainer), and store in the refrigerator.

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{ 10 comments… read them below or add one }

1 Produce on Parade May 15, 2013 at 4:53 PM

Wow, this is genius! Do you have any idea about how long one recipe will keep in the fridge? Thanks so much!

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2 Stephanie Weaver May 15, 2013 at 5:48 PM

Officially, I recommend using it within a week or two. You could make it and freeze it in ice cube trays in tiny portions, then thaw as needed.

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3 Allergies November 8, 2012 at 3:52 PM

My husband is allergic to seaweed. Is there anything you can recommend in place of the nori?

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4 Recipe Renovator November 8, 2012 at 6:58 PM

Hi, I don’t know what to tell you here… I can’t think of anything besides seaweed that would give you that fishy/sea taste. So sorry!

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5 Jessica May 25, 2011 at 11:03 PM

Ok, this is probably a really dumb question, but I’m just wondering… when you pass the mixture through a fine mesh strainer, which part do you keep – the liquid or what’s left in the strainer?

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6 Recipe Renovator May 25, 2011 at 11:56 PM

You keep the liquid and toss or compost what’s left in the strainer. I’ll clarify the directions. Thanks for your question!

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7 Lentil Breakdown May 23, 2011 at 5:18 AM

This is a great idea!

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8 Recipe Renovator May 23, 2011 at 4:05 PM

Thanks! Let me know if you try it. It was pretty amazing in today’s recipe for Bo La Lot. http://bit.ly/iQCwtM

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9 Andrew @ Eating Rules May 23, 2011 at 3:59 AM

This looks terrific! I’ve been wanting to get some fish sauce for my pantry, but when I see how much sodium is in it, I just can’t do it — so this looks like a great way to go for sodium reasons as well.

The “best” store-bought one I’ve found has about 700mg of sodium per ONE tablespoon. The worst? 1,350mg of sodium per tablespoon. I don’t know how they actually get that much sodium to stay in solution!

Any idea on the sodium content of the miso paste?

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10 Recipe Renovator May 23, 2011 at 4:09 AM

Thanks Andrew. For you, I got out my calculator. Miso is very salty, but it’s also really concentrated. For this recipe, using the miso paste I have, it comes out to 128 mg of sodium per tablespoon. Not bad in comparison.

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