How long does gravlax take to cure?

Gravlax is Scandinavian cured salmon — salmon fillet rubbed with a salt + sugar + dill mixture, weighted, and refrigerated for 1.5–3 days. The cure draws out moisture, firms the texture, and concentrates flavor. No cooking, no smoking — just salt-cure.

Standard timing (per fillet thickness):

1-inch (2.5cm) thick salmon fillet: - 36 hours: lightly cured, mild - 48 hours: standard target — firm, salty-sweet, beautifully translucent - 60 hours: deeper cure, drier - 72 hours: fully cured + drier still

1.5-inch (4cm) thick fillet: - 48 hours: under-cured center - 60 hours: standard target - 72 hours: fully cured

Thin pieces (1/2-inch / 1.5cm): - 24 hours: cured enough - 36 hours: standard target

The cure mixture (per 1 kg salmon): - 60g coarse kosher salt (~5–6% by weight) - 60g sugar (white, or 50/50 white+brown) - 1 small bunch fresh dill, chopped (essential to gravlax identity) - Optional: white pepper, fennel seed, juniper, vodka (Aquavit traditional), beetroot - Optional: lemon zest, capers

The method (Scandinavian standard): 1. Mix salt + sugar + dill thoroughly 2. Spread cure mix on both sides of salmon fillet 3. Place skin-down in non-reactive dish (glass, ceramic, plastic) 4. Top with another fillet skin-up (sandwich, classic) OR weight directly 5. Cover with plastic wrap pressed onto surface 6. Weight with 2–3 lbs (cans, bricks, or weighted plate) 7. Refrigerate 36–72 hours, flipping every 12 hours 8. After cure: rinse off cure, pat dry 9. Slice paper-thin against the grain on a slight angle

Why weight + flipping matter: - Weight presses cure into flesh evenly - Flipping ensures even cure on both sides - Without weight: top dries faster than bottom (uneven cure) - Without flipping: side touching weight cures more than opposite

The "done" indicators: - Color: deep orange-pink, slightly translucent (raw was bright opaque) - Texture: firm to touch (not soft anymore) - Center: same color/texture as edges (cured all the way through) - Smell: clean ocean + dill, no fishy-raw smell

Don't: - Skip the weight (uneven cure) - Use farmed salmon flesh-side down on the dish (sticks; place skin-down) - Add sugar in 1:2 salt:sugar ratio (too much salt = harsh; 1:1 is sweet spot) - Skip flipping (one side over-cures) - Use frozen-then-thawed salmon for sashimi-style serving (fish must be flash-frozen first for parasites)

Storage of finished gravlax: - Refrigerated (wrapped in plastic): 1 week - Vacuum-sealed: 2 weeks - Frozen: 3 months - Texture continues firming for first 24 hours after rinse; peak flavor at days 3–5 post-rinse

Variations: - Beetroot gravlax: rubbed with grated raw beet → vibrant pink color, earthy flavor - Vodka gravlax: brushed with Aquavit/vodka before cure → traditional Nordic version - Smoked gravlax: gravlax + cold smoke 4–6 hours after cure - Lime gravlax: replaces dill with lime + cilantro for fusion variation

Safety note (parasites): - Wild Atlantic salmon: traditional gravlax country origin; parasites rare but possible - Farmed salmon: parasite-controlled; safer for traditional gravlax - For sushi-grade safety: USE FISH PREVIOUSLY FROZEN at -4°F (-20°C) for at least 7 days, OR frozen at -31°F (-35°C) for at least 15 hours

Cross-reference: see /pages/how-long-does/preserved-lemon-cure for similar dry-cure methodology + /pages/how-long-does/curing-bacon for similar timing-by-thickness pattern.

Most published references (Magnus Nilsson "The Nordic Cookbook", Michael Ruhlman + Brian Polcyn "Charcuterie", Hugh Fearnley-Whittingstall "The River Cottage Fish Book") converge on 48-hour cure for standard 1-inch fillets.