Fish Sauce vs Anchovies (Culinary Comparison)

Fish sauce and anchovies both add savory depth, but they behave differently in a recipe. Fish sauce blends in as a salty liquid; anchovies bring concentrated flavor, some texture, and often oil. Start with about ½ teaspoon fish sauce per anchovy fillet, or 1–2 anchovy fillets per teaspoon of fish sauce, then taste and adjust.

A dish can taste flat even when you have added salt. That is because saltiness and savory depth are not the same thing. Fish sauce and anchovies can both help build that depth, yet swapping one for the other without adjusting the recipe may make it too salty, too fishy, or too oily.

I compare them by flavor, texture, and cooking use, then give you a careful substitution method. The ratios are starting points, not exact conversions: brands, fillet sizes, and recipe amounts all affect the result.

What fish sauce and anchovies are

Fish sauce is a salty liquid made by fermenting fish, often with salt. Anchovies are small fish sold in forms such as salted fillets, oil-packed fillets, or whole salted fish. Both can add umami, the savory taste found in foods such as aged cheese and cooked tomatoes.

Fish sauce usually pours into a dish and disperses quickly. Anchovy fillets need to be mashed or chopped to spread their flavor, though they can soften and dissolve during cooking. Their packing oil can also affect a recipe’s fat level.

The ingredients are not interchangeable in every respect. Fish sauce brings salt and a liquid seasoning; anchovies bring fish flesh, salt, and sometimes oil. In a smooth dressing or broth, that difference may be easy to manage. In a pasta sauce where anchovies are meant to melt into olive oil, fish sauce can provide savoriness but will not create the same body.

Flavor, texture, and the best choice

Fish sauce tends to add a direct salty-savory note without leaving pieces behind. Anchovies can give a dish more body and a deeper flavor when mashed into oil or a sauce. Neither is always better: choose based on the texture you want and how visible you want the ingredient to be.

Fish sauce can smell strong when poured or heated, but its aroma usually changes as it mixes into a dish. Add it in small amounts, especially if you are unfamiliar with the brand. Anchovies also have a distinct aroma, but when softened and mashed with aromatics, they can become part of the background rather than taste like separate fish pieces.

Choose fish sauce when you want an easy-to-measure liquid seasoning, such as in a soup or dressing. Choose anchovies when you want the fish to dissolve into oil, or when a recipe depends on the added body of mashed fillets. If you need a smooth finish, either can work, but stir fish sauce in well and mash anchovies thoroughly.

How to substitute one for the other

A substitution ratio is a place to start, not a promise of equal salt or flavor. For 1 anchovy fillet, start with about ½ teaspoon of fish sauce. To replace 1 teaspoon of fish sauce, start with 1–2 oil-packed anchovy fillets, mashed into the dish.

Replacing anchovies with fish sauce

Measure fish sauce separately and add it in small increments. Start with ½ teaspoon for each anchovy fillet, stir, and taste before adding more. This works best in soups, stews, dressings, and sauces where a liquid seasoning fits the recipe.

If the recipe calls for anchovies cooked in oil, fish sauce will not reproduce that step’s texture or fat. You can still use fish sauce for savory depth, but keep the recipe’s cooking fat as written unless you have another reason to change it. Avoid adding the full amount of recipe salt before tasting.

Replacing fish sauce with anchovies

For each teaspoon of fish sauce, start with 1–2 oil-packed fillets. Drain excess oil if it would make the dish greasy or change the intended amount of cooking fat. Mash the fillets with a fork, or let them soften in warm oil while you stir.

Anchovy products vary in saltiness and size. Taste the dish before adding salt, and remember that the fillets add solid material. If the recipe needs to stay very smooth, use a small amount of anchovy paste if available, or choose fish sauce instead.

Material setup and ingredient prep

Choose a pan that fits the burner and suits the recipe, but remember that cookware results depend on its construction and the maker’s guidance. Both ingredients work in stovetop and oven dishes. For acidic sauces, stainless steel or enamel is a sensible choice; avoid holding acidic mixtures in bare aluminum or uncoated cast iron or carbon steel.

Before cooking, taste an anchovy if you are unsure how salty it is. Rinse it only if it seems especially salty, then pat it dry; rinsing can remove some surface salt, but it does not make every product predictable. Drain oil-packed fillets when their oil would alter the recipe.

For a stainless-steel pan, about 2–3 minutes over medium heat is a practical preheat starting point. Actual timing varies with burner, pan size, and pan construction. Add cooking fat and aromatics once the pan is ready. Avoid prolonged empty preheating, especially with nonstick cookware, and do not wait for oil to smoke. Smoke point varies with oil type, refinement, age, and condition; use an oil whose manufacturer-listed smoke point is above the cooking temperature.

Cooking technique: dissolve anchovies, add fish sauce

Add anchovies early enough to soften and dissolve; add fish sauce in small amounts during a simmer or near the end. This timing helps distribute anchovy flavor through the cooking fat and lets you control fish sauce’s salt and aroma. Taste before adding more salt, especially if the liquid will reduce.

A practical sequence is:

• Warm the pan, add suitable cooking fat, then soften the aromatics.
• Add anchovies and stir, pressing them with a spoon until they break down. They may not vanish completely, depending on the recipe and cooking time.
• Add the recipe’s liquid. If substituting with fish sauce, begin with the suggested ratio and stir it in.
• Simmer as directed, then taste. Add fish sauce a little at a time if more savory depth is needed.
• Recheck salt after reduction. As water evaporates, the remaining liquid can taste saltier.

Fish sauce can be added during cooking, but a long simmer may concentrate its salt and aroma as liquid reduces. If you want precise control, add some during cooking and reserve a little for the end. This is especially helpful in a dish that will simmer for a long time.

Cleaning, reactivity, and cookware care

The main cookware concern is prolonged contact between acidic food and reactive or seasoned surfaces, not a special pan requirement for fish sauce or anchovies. Acid in a sauce may come from tomatoes, citrus, or vinegar. Avoid leaving acidic fish-sauce mixtures sitting in bare cast iron, carbon steel, or aluminum.

Stainless steel and enamel are useful choices for acidic sauces. If you cook in bare cast iron or carbon steel, do not store or hold an acidic mixture in the pan. When cooking is done, transfer the food and clean the cookware according to its care instructions.

For stainless steel or enamel, deglaze while the pan is warm by adding the recipe’s liquid and loosening browned bits with a wooden or silicone utensil. Let cookware cool before washing; do not shock a hot pan with cold water. Dry bare cast iron or carbon steel promptly, then restore a light oil film if that is part of its care routine.

Practical cooking examples

These examples show how the choice changes with the dish. The right amount still depends on the recipe, brand, and taste, so treat each as a starting method rather than a fixed formula.

• Tomato pasta sauce: Mash anchovies into warm oil with aromatics before adding tomatoes. If using fish sauce instead, stir in a small measured amount during cooking, then taste near the end. Tomatoes already add acidity, so avoid leaving the sauce for a long time in bare reactive cookware.
• Soup or broth: Fish sauce is easy to distribute in a liquid. Add a little, stir, and taste before adding salt. Anchovies can also work, but mash or dissolve them well to avoid unwanted pieces.
• Salad dressing: Fish sauce blends into a liquid dressing. For anchovies, mash them into a paste before whisking. Taste before salting; other ingredients, such as cheese or olives, may also contribute salt.
• Slow-cooked sauce: Anchovies can be added early to soften into the cooking fat. If using fish sauce, add part of it during cooking and taste again near the end, especially if the sauce has reduced.

Serving, tasting, and final salt adjustment

Taste for more than salt: check savory depth, acidity, and whether the fish flavor stands out too much. Fish sauce and anchovies can support other flavors, but adding more is not always the fix for a dish that tastes unbalanced. Make small changes, stir, and taste again.

Hold back some added salt until the dish is nearly finished. Check the fish sauce label because sodium varies by brand. For a simple estimate, 1 teaspoon provides one-third of the sodium listed for 1 tablespoon, assuming the label gives values for that serving size. Anchovy products also vary, so taste them and the finished dish before salting.

A useful final check is to taste a spoonful with the food it will accompany. A sauce may seem salty on its own but taste balanced with unsalted pasta or rice. If it is too salty, adding more unsalted ingredients or liquid may help, though it can change the dish’s flavor and texture.

Frequently asked questions

These quick answers cover the most common substitution and cooking concerns. Use them as practical starting points, then adjust to your recipe and the salt level of your ingredients.

Can I use fish sauce instead of anchovies?
Yes. Start with about ½ teaspoon fish sauce for each anchovy fillet, then taste and adjust. It adds savory flavor but does not replace the fillet’s texture or oil.

How many anchovies replace 1 teaspoon of fish sauce?
Start with 1–2 oil-packed anchovy fillets. Mash them into the dish, and drain excess packing oil if it would change the recipe.

Which is saltier, fish sauce or anchovies?
It depends on the brand and product. Check fish sauce sodium on the label and taste anchovies before adding salt.

Should I add fish sauce early or late?
Add it in small amounts during the simmer or near the end. A long reduction can concentrate salt and aroma.

When should I add anchovies to a sauce?
Add them early enough to soften, usually with the aromatics and cooking fat. Stir and mash them so their flavor spreads through the dish.

Do anchovies dissolve when cooked?
They soften and can break down when cooked and mashed, but they may not disappear completely. Cooking time and the fillet’s form matter.

Can I use anchovy oil instead of fish sauce?
Anchovy oil can add flavor and fat, but it is not a direct substitute for fish sauce. Account for the extra oil and adjust salt separately.

Can I cook fish sauce in an oven dish?
Yes. Fish sauce can season oven dishes, as well as stovetop dishes. Add it in measured amounts and reassess salt after cooking.

What pan should I use for a fish-sauce tomato sauce?
Stainless steel or enamel is a sensible choice for an acidic sauce. Avoid prolonged contact with bare aluminum, cast iron, or carbon steel.

Do I need to add salt if I use either ingredient?
Not automatically. Taste near the end and add salt only if the dish needs it. Both products vary in salinity.

(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)