The Canon

Herring with Onions

Hollandse NieuwenlMaatjesharingnl

Also: Nieuwe Haring, Maatjes, Dutch New Herring, Hollandse Maatjes

A whole young Atlantic herring, lightly salt-cured at sea using its own pancreatic enzymes (maatjes cure), served raw and cold with finely diced raw white onion and pickled gherkins.

Identity criteria

  1. 1The herring must be caught before the gonads develop — specifically young fish (jongvolwassen) with a fat content of at least 16%, harvested from the North Sea before August 1st
  2. 2Cured using the maatjes method: lightly salted with the pyloric caecum (pancreas-adjacent enzyme sac) left in, enabling an enzymatic self-cure that produces the signature mild, creamy texture
  3. 3The fish is gutted and giblets removed except the enzyme sac; it is NOT cooked, smoked, or heavily brined — it remains essentially raw
  4. 4Served cold, typically held by the tail and eaten in one or two bites, or chopped and served on a white bun (broodje haring)
  5. 5Raw finely diced white onion is non-negotiable — it provides the sharp aromatic counterpoint to the fatty, mild fish
  6. 6Pickled gherkins provide the acid balance; the dish is the triad of fish, onion, and pickle eaten together

Components

Base

Young Atlantic herring (Clupea harengus), maatjes-cured whole filletessentialMust be season-caught, high-fat (≥16%), enzyme-self-cured — no substitution preserves identity

White soft bread roll (for broodje haring variant)optionalOptional vessel; traditional street presentation omits bread

Aromatics

Raw white onion, finely dicedessentialCooked or caramelized onion breaks the dish entirely

Fat

Herring's own intramuscular fatessentialThe 16%+ fat content is what defines 'nieuwe' and gives the dish its creamy, mild character

Acid

Pickled gherkins (augurken)essentialProvides the acid balance against the fat; sweet pickles are a common degradation

Seasoning

Salt (curing salt applied at sea)essentialLight cure only — heavy brining destroys the texture and is not maatjes

Technique

Maatjes curing
Unlike standard salt herring, maatjes curing leaves the enzyme-rich pyloric caecum in place; the fish partially digests itself over days, producing the characteristic creamy, non-fishy, mildly saline flesh — omitting this step or using post-spawn herring produces a completely different product
Cold-chain preservation post-cure
The fish is never heated; maintaining near-freezing temperature from catch through service is what makes raw consumption safe and preserves the delicate enzyme-developed texture
Filleting with skin-on
The fillet is deboned but the skin is left on and the fish is served as two joined fillets (split butterfly); removing the skin before service is considered a quality degradation

Form & serving

Served
Cold, whole butterfly fillet held by the tail and tilted into the mouth (traditional), or chopped into bite pieces on a white bun with onion and gherkins on top
Temperature
Cold (2–5°C / 36–41°F)
Portion
1–2 whole fillets per serving (one fish = two joined fillets)
Pairs with
Jenever (Dutch gin) · Cold pilsner · Aquavit · Broodje (soft white roll) · Strong mustard (regional variant)

Character

Flavour

mildsalinecreamyoceanicpungent (onion)bright-acid (pickle)umami

Texture

Silky, slightly yielding, almost buttery flesh from enzymatic self-cure; raw but not gelatinous; gherkin provides crunch contrast; onion provides crisp sharpness

Eaten

Dutch street food, sold from haringkar (herring carts) at markets and harbors; eaten standing, either lifted by the tail or on a bun; a seasonal ritual anchored to the late-May/June North Sea herring fleet return; also served in seafood restaurants and traditional Dutch cafés (eetcafés) as a starter or snack

When

late-spring · early-summer

Variations & related

Regional variations

  • Broodje Haring · Netherlands

    Chopped maatjes fillet served in a soft white bun piled with raw onion and sliced gherkins; the dominant urban/market format

  • Zure Haring · Netherlands

    Herring cured in a vinegar-onion brine rather than maatjes salt cure; a distinct product with sharper acidity, not interchangeable

  • Rollmops · Germany / Netherlands

    Herring rolled around a pickle and cured in vinegar; related but categorically different (vinegar-pickled, not enzyme-cured, served differently)

  • Bismarck Herring · Germany

    Filleted herring in vinegar-and-onion marinade; German sibling, acid-dominant vs. the mild fatty Dutch profile

Related dishes

  • sibling Rollmops

    Vinegar-cured rolled herring variant popular across Germany and the Netherlands; same base fish, different cure, different form

  • sibling Bismarck Herring

    German vinegar-marinated herring; same raw fish base, acid-dominant profile versus maatjes' fat-dominant mildness

  • sibling Gravlax

    Salt-and-sugar cure applied to salmon; shares the enzyme-assisted cold-cure philosophy but different fish, flavor, and serving tradition

  • pairs-with Jenever

    Traditional Dutch pairing; the botanical, slightly oily spirit mirrors and cleanses the fatty herring

  • descendant Broodje Haring

    Urbanized sandwich form of the same fish; the most common contemporary serving format in Dutch cities

Substitutions

  • Maatjes (young high-fat herring) → Regular salted herring or pickled herringinadmissible

    Destroys the dish — the mild, creamy enzymatic character is replaced by sharp brine or vinegar; the result is a different preparation entirely

  • Raw white onion → Caramelized or cooked onioninadmissible

    Removes the essential sharp aromatic contrast; the dish becomes flat and sweet

  • Raw white onion → Raw shallotadmissible

    Acceptable mild variation; shallot is slightly less pungent but structurally equivalent

  • Pickled gherkins → Sweet pickles or relishinadmissible

    Sweet pickles flatten the acid counterpoint and push the dish into an incorrect flavor register

  • Pickled gherkins → Cornichonsadmissible

    Safe — cornichons deliver equivalent acidity and crunch in a smaller form

  • Fresh maatjes → Canned or jarred herring in oilinadmissible

    Oil-packed herring lacks the enzymatic cure character; texture and flavor are categorically different

Common mistakes

  • Using out-of-season or post-spawn herring with fat content below 16% — the fish will be lean and sharp rather than creamy and mild
  • Substituting vinegar-pickled or canned herring for maatjes-cured, producing an acidic product with none of the enzymatic richness
  • Using sweet pickles or pickle relish instead of sour gherkins, which collapses the acid-fat balance
  • Serving at room temperature — the fish must be near-fridge cold; warmth amplifies fishiness and breaks the texture
  • Omitting raw onion or pre-cooking it, removing the essential pungent aromatic counterpoint
  • Over-curing or sourcing heavily brined product labeled 'herring' that is not maatjes-specific; the word 'maatjes' on sourcing is the critical qualifier
  • Presenting as a cooked dish or adding heat at any stage — the dish is entirely raw and must remain so

Provenance

Hollandse Nieuwe is a Dutch tradition dating to at least the 14th century, closely tied to the North Sea herring fishery that underpinned Dutch commercial prosperity. The maatjes curing technique — lightly salting with the pyloric caecum retained — is attributed to fishing practice refined over generations at sea, with Willem Beukelszoon of Zeeland historically (and somewhat apocryphally) credited with formalizing the gutting-and-curing method around 1380–1395. The annual 'nieuwe haring' season opening, marked by Vlaggetjesdag (Flag Day) in Scheveningen, remains a national food event.

Claimed by: Netherlands

References

  1. 1.Dutch Commodity Board for Fish (Productschap Vis) definition of Hollandse Nieuwe
  2. 2.EU Protected Geographical Indication criteria for Hollandse Nieuwe Haring
  3. 3.Harold McGee — On Food and Cooking (herring curing chemistry)
  4. 4.Alan Davidson — North Atlantic Seafood
  5. 5.Oxford Companion to Food — herring entry

Confidence: high