How to Cook Lobster — Steam, Don't Boil

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Steam a 500g (1 lb) lobster for 8 minutes, a 680g (1.5 lb) for 11 minutes, and a 900g (2 lb) for 13 minutes — adding 2 minutes per additional 250g. Internal tail temperature must reach 63°C/145°F, measured at the thickest point where the tail meets the body. Steaming, not boiling, is the definitive method for cooking whole lobster because it delivers gentler, less turbulent heat, preventing the waterlogging and protein shock that makes boiled lobster rubbery and washed-out. The species matters enormously. Homarus americanus — the Maine or American lobster, cold-water, hard-shelled — carries the richest, sweetest meat and the prized claw yield that no other species matches. Panulirus argus and its warm-water spiny lobster relatives lack claws entirely; their value is concentrated in the tail, which cooks faster and demands even more vigilance against overcooking. Langoustines (Nephrops norvegicus), the slender Norwegian lobster, are the most delicate of all — their thin shells mean they steam through in 4-5 minutes and cross from succulent to chalky in thirty seconds of neglect. The quality hierarchy: (1) Competent — the lobster is cooked through, the meat releases from the shell, no raw translucence remains. (2) Skilled — the tail meat is opaque white with a faint pink blush, the claw meat pulls free in one piece, the tomalley is set but still creamy-green. (3) Transcendent — the meat has a springy, almost custard-like yield when bitten, the juices pooling in the shell taste of clean ocean brine, and the knuckle meat — the most flavourful section, which most cooks ignore — is extracted intact and glistening. Sensory tests define your result. Sound: a properly steamed lobster releases a quiet hiss when the tail is cracked back — trapped steam escaping from perfectly cooked muscle fibres. Smell: sweet, briny, with no trace of ammonia (ammonia signals a lobster that was dead too long before cooking). Texture: press the thickest part of the tail — it should feel firm but give slightly, like the pad of your thumb when you touch your index finger to your thumb tip. Visual: the shell is uniformly bright red-orange; any dark patches indicate uneven steam circulation, meaning you overcrowded the pot. The method: bring 5cm of salted water (30g salt per litre — seawater concentration) to a vigorous boil in a pot fitted with a steamer rack or insert. The lobsters must sit above, never in, the water. Place them in headfirst, cover tightly, and start your timer only when steam visibly escapes the lid. Do not lift the lid during cooking — every opening costs 30 seconds of recovery time. Where the dish lives or dies: the resting period. Pull the lobster 1 minute before the calculated time and let it rest, covered, for 3 minutes. Carryover heat finishes the cooking gently. Skip this, and you choose between underdone centre and overdone edges — there is no middle path. The drawn butter you serve alongside should be clarified and held at 60°C/140°F: hot enough to stay liquid, cool enough not to mask the lobster's own sweetness. In Cantonese ginger-scallion lobster, the same steaming principle applies — brief, gentle heat — before the wok finishes the dish. The technique translates because the truth is universal: lobster meat is lean, delicate protein that punishes aggression and rewards restraint.

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