Cold sauces & condiments
Patis
Patis · Patis is a clear, amber-brown liquid condiment produced by the prolonged fermentation of small whole fish with sea salt, or alternatively recovered as the liquid runoff from bagoong (fermented shrimp paste) crocks. It functions as a salt-and-umami seasoning agent across Filipino cuisine.
The formula
3 parts small fish : 1 part sea salt by weight (traditional ratios range from 5:1 to 3:1)
No water is added; the liquid emerges from fish tissues as salt-bound proteins hydrolyze.
Identity
- clear amber-to-brown translucent liquid
- intense salty and umami aroma
- pungent fishy nose that mellows dramatically when cooked
- thin, free-flowing, non-oily consistency
- no visible fish solids in well-decanted patis
- staple salt-and-savory seasoning of Filipino pantries
Ingredients
| Base | small whole fish (anchovies, sardines, or assorted species) | Provides the muscle proteins that break down into free amino acids during fermentation, generating patis's signature umami. |
| Seasoning | coarse sea salt | Draws moisture from fish via osmosis, inhibits putrefactive bacteria, and selects for salt-tolerant halophilic enzymes that drive fermentation. |
| Culture | ambient enzymes and halophilic microorganisms from fish, salt, and environment | Naturally present; no starter is added in traditional production. These microbes carry out the long hydrolysis that defines patis. |
| Liquid | liquid byproduct released from bagoong (fermented shrimp paste) fermentation | Some commercial patis is recovered as the amber runoff skimmed off shrimp-fermentation crocks before the paste is salted down. |
Method
- 1Wash assorted small fish thoroughly to remove dirt, blood, and slime.Clean fish reduce spoilage contaminants while preserving the natural microflora needed to drive fermentation.
- 2Layer the fish with sea salt in fermentation vessels, finishing with a salt cap on top.Salt pulls water from the fish tissue, creating a brine that selects for salt-tolerant enzymes and prevents putrefactive spoilage.
- 3Seal or cover the vessels and leave them undisturbed for several months (typically 6–12 months).Extended undisturbed aging allows endogenous fish enzymes and salt-loving bacteria to hydrolyze proteins into free amino acids, producing deep umami and a nuttier, cheesier flavor.
- 4Siphon or decant the amber liquid (the patis) that pools above the fish solids.The clarified liquid is the prized seasoning; the remaining solids become further-processed into bagoong or fish paste.
- 5Alternatively, collect the amber runoff from bagoong (fermented shrimp) crocks before the paste is packed down.Patis-as-byproduct is a traditional way to recover value from shrimp fermentations and shares the same fermented-fish-savory character.
- 6Bottle the clear patis in sealed glass or food-grade containers and store away from heat and light.High salt and complete fermentation make the liquid shelf-stable for years at ambient temperatures.
Techniques that matter
Layered salt fermentation
Lets salt penetrate the fish progressively as the weight of upper layers compresses the lower ones, ensuring an even cure without stirring.
Long, undisturbed aging
Slow enzymatic and microbial hydrolysis develops the deep umami that brief fermentation cannot reach; rushing the process leaves a harshly fishy result.
Decanting (not straining)
Decanting keeps patis crystal-clear and free of suspended solids, which is the mark of a high-quality product.
Variations & derivatives
Anchovy patisPhilippines (general)
The most common base; produces a clean, salty, slightly sweet liquid prized for everyday seasoning.
Sardine or mixed-species patisPhilippines (general)
Mixed catches yield a more robust, fuller-bodied sauce with broader flavor.
Bagoong-runoff patisPhilippines (general)
Recovered from fermented shrimp-paste crocks; carries a slightly sweeter, shrimp-edged note.
Used in these dishes
Substitutions
- Patis → Thai nam pla — Similar fermented-fish profile but lighter and a touch sweeter; works well in cooked dishes, slightly less punchy in raw dips.
- Patis → Vietnamese nuoc mam — Darker and more intensely savory; acceptable in cooked applications but can overpower raw dipping sauces.
- Patis → Light soy sauce — Provides salt and some umami but completely lacks the fermented-fish depth of patis; a last-resort substitute only.changes result
Troubleshooting
Patis smells sharply fishy or putrid
Insufficient salt or fermentation disrupted by putrefactive bacteria before halophilic microbes took over. → Discard the batch and start over with a stricter salt-to-fish ratio (no less than 1:3 salt:fish by weight).
Patis is cloudy or milky
Solids suspended in the liquid, or fermentation halted before proteins fully settled and clarified. → Allow longer settling undisturbed, then decant only the clear top layer and avoid disturbing the bottom solids.
Patis is salty but flat, with little umami depth
Fermentation time too short; proteins have not yet hydrolyzed into free glutamate and other savory amino acids. → Age the salted fish longer (6–12+ months) before decanting the patis.
Patis develops a pink or reddish tint
Cross-contamination from bagoong (shrimp) fermentation in shared vessels. → Keep fish-only and shrimp-only crocks strictly segregated; treat the tinted liquid as a bagoong-runoff style patis.