Fermented meat around the world
Dry salami, sour pork with rice, matured sheep and aged blubber follow different paths from animal to food. Their stories connect microbes with climate, slaughter, migration and the meals people share.
Gravad lax
Salmon is cured with salt, sugar, pepper, dill and lemon zest under refrigeration.
What gravad lax is
Gravad lax, or gravlax, is raw salmon cured for one to two days under a weighted layer of salt, sugar, pepper and dill. The fish is sliced thinly and served cold, often with a mustard or dill sauce and rye bread. The result is firm, glossy and savoury, with a sweetness from the sugar that softens the salt.
The name is Swedish and refers to fish buried or weighted to cure in the ground. The recipe here is a modern home version. The source does not assert a date of origin, so the page does not give one.
Sources for this section
How the cure works
Salt and sugar draw water out of the flesh and dissolve into the juice that forms, so the fish firms and its flavour concentrates. The fish is turned during the cure so the dressing reaches every surface, and the weight keeps the flesh in contact with it. Because the fish is not cooked, the cure changes its texture but does not make the salmon safe by itself.
The method gives one to two days in the refrigerator with turning. Dill and lemon zest add aroma and do not change the process.
Sources for this section
Safety, freezing and serving
Raw fish carries hazards that a short salt-and-sugar cure does not remove. The FAO code of practice for fish and fishery products and the UK risk assessment for Listeria monocytogenes both treat chilled, cured fish as a category that needs control. Freezing advice in the source gives no temperature, so the page does not assume a household freezing schedule is sufficient.
Validated storage duration is absent from the sources. The practical rule they support is to use fish suitable for raw eating, keep it cold throughout, and serve it promptly rather than store it for an extended period.
History
Modern recipe source associates the preparation with Sweden; no origin date asserted.
Ingredients
Scaling: source batch only
Salmon filletPin-boned.
1 kg
Caster sugarCure.
44 mL3 tbsp as recorded
SaltCure.
59 mL4 tbsp as recorded
Black pepperCrushed.
9.9 mL2 tsp as recorded
Fresh dillChopped.
1 bunch
Lemon zestZest.
1 lemon
Method
Risks and precautions · High risk
Parasites in raw salmon
Gravlax is served uncooked. Parasites may remain unless the fish has received an applicable parasite treatment or a documented exemption applies.
Hazard sourceBacteria and cross-contamination from raw fish
Salt and sugar curing does not cook salmon or kill all harmful germs. Raw fish can contaminate ready-to-eat foods through hands, utensils or surfaces.
Hazard sourceFishborne hazards
Salt and sugar do not control every fish hazard.
Hazard sourceBefore raw curing, use supplier-confirmed parasite-treated fish or fish with a documented applicable exemption.
Control sourceKeep seafood refrigerated during handling and curing.
Control sourcePrevent cross-contamination from raw seafood to ready-to-eat foods.
Control sourceThis preparation is not cooked. Salt and sugar curing do not remove every fishborne hazard.
Visit Sweden’s 72-hour freezing advice does not state a temperature; do not use it or an unverified household freezer cycle as evidence of parasite control. The FSA lists gravlax among raw fishery products needing treatment unless a supplier/operator documents an applicable exemption.
No validated storage duration is established for this home-cured raw fish. Keep it refrigerated at or below 4°C, serve chilled promptly and do not infer that slicing or freezing after curing extends safe storage.
FDA guidance advises pregnant people, children, older adults and people with weakened immune systems to avoid raw or undercooked fish.
Separate raw fish and its utensils from ready-to-eat food; wash hands, boards, dishes and surfaces after handling.
- Source the salmon for uncooked service. Gravlax remains raw after curing. Ask the fish supplier to confirm that it has undergone an applicable parasite treatment for raw consumption or qualifies for a documented exemption. The UK Food Standards Agency specifically names gravlax among fish intended to be eaten raw: its food-business treatment requires all parts to reach either −20°C for at least 24 hours or −35°C for at least 15 hours, unless a qualifying exemption applies. These are commercial controls, not a validation of a household freezer. Visit Sweden’s 72-hour advice gives no temperature, so do not treat it as proof of parasite control. If the supplier cannot confirm treatment or exemption, choose a cooked salmon dish instead.
- Keep the fish cold while handling it. If frozen, thaw it in the refrigerator. Keep it at or below 4°C (40°F) during the cure, using a refrigerator thermometer. Keep raw fish and its utensils separate from ready-to-eat food; wash hands, boards, dishes and surfaces after handling raw seafood.
- Mix the sugar, salt, pepper, chopped dill and lemon zest.
- Rub the cure over the salmon fillets. Place them flesh-to-flesh, with the narrow tail end against the thicker neck end. Wrap and set them in a dish under a weight.
- Refrigerate for 24–48 hours, turning the package occasionally. Maintain a refrigerator temperature at or below 4°C throughout; the cure does not cook the fish.
- Remove the cure and slice the salmon thinly just before serving. Keep it chilled until service and do not leave it at room temperature for more than two hours. No validated storage duration is established for this home-cured raw fish, and slicing or freezing after curing is not a validated way to extend its safe storage.
- This is raw fish. Freezing can address parasites when a validated treatment is met, but it does not kill all harmful germs. FDA guidance advises pregnant people, children, older adults and people with weakened immune systems to avoid raw or undercooked fish.
Conditions
Fermentation24–48 h
Temperatureup to 4°C
Temperature controlRefrigerated
Places
Sweden
Traditional preparation · Country evidenceThe source documents a Swedish-associated home recipe, not a historical birthplace.
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Sources
Visit SwedenRecipe · Process · Regional context
Cured salmon (aka gravad lax) recipe1 kg salmon, 3 tbsp sugar, 4 tbsp salt, 2 tsp pepper, dill, lemon zest; weighted chilled cure 1–2 days; freezing advice 72h lacks freezer temp.
Cited in: What gravad lax is; How the cure works; Safety, freezing and serving
FAO / Codex AlimentariusSafety
Code of Practice for Fish and Fishery ProductsFish hazards include parasites, histamine, pathogens and botulinum toxin.
Cited in: Safety, freezing and serving
Food Standards AgencySafety
Listeria monocytogenes risk assessmentEvidence supports Listeria hazard in chilled ready-to-eat foods.
Cited in: Safety, freezing and serving
Food Standards AgencySafety · Process
Freezing fish, fishery products and treatment for parasitesFSA guidance for food businesses names gravlax among raw or lightly treated fishery products that require parasite treatment unless a specific exemption applies.
For the stated FSA parasite treatment, all parts of the product must reach -20°C for at least 24 hours or -35°C for at least 15 hours.
A general freezing exemption applies to qualifying farmed Atlantic salmon produced under specified controlled conditions; a supplier/operator is responsible for demonstrating the exemption.
U.S. Food and Drug AdministrationSafety · Handling
Selecting and Serving Fresh and Frozen Seafood SafelyFDA advises storing seafood in a clean refrigerator at 40°F (4°C) or below and using a thermometer.
FDA says previously frozen fish is a risk-reduction rule of thumb for raw fish, but freezing does not kill all harmful germs.
FDA advises separating raw seafood from ready-to-eat food and says pregnant people, children, older adults and people with weakened immune systems should avoid raw or undercooked fish.