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Recipe · Smoked · Medium

Hot-Smoked Whole Mackerel on the Kamado

Whole mackerel, half an hour in brine and forty-five minutes of cherry smoke at 120 °C: taut copper skin, juicy flesh and real smoke. Nothing like cold-smoked salmon, and it is eaten the same day.

Quick answer

Mackerel is hot-smoked on a kamado with the deflector in place and the chamber at 105-130 °C, ideally 120 °C. Brine it for 30 minutes in a 10% solution, air-dry until the skin is tacky, then smoke over cherry wood for 40-50 minutes, to 62-65 °C in the loin. Above 130 °C the skin bursts and the fish steams.

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Prep
25 min
Cook
45 min
Servings
4 servings
Temperature
120 °C

Ingredients

  • whole mackerel, 300-400 g each, gutted and gills removed4 ud
  • cold water1500 ml
  • coarse sea salt150 g
  • sugar30 g
  • bay leaves2 ud
  • black peppercorns1 cda
  • lemons, one sliced and one to serve2 ud
  • dill sprigs4 ud
  • garlic cloves, sliced2 ud
  • extra virgin olive oil2 cda
  • cherry wood chips for smoking, about 60 g1 puñado
  • flaky sea salt, to serve1 pizca

The gear for this recipe

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Method

  1. 01

    A short brine

    Dissolve the salt and sugar in the cold water along with the bay and peppercorns. Submerge the gutted mackerel, cover and leave for 30 minutes in the fridge, not a minute more: the flesh is thin and over-salted mackerel is inedible. Lift them out, rinse under the tap and dry them thoroughly inside and out.

  2. 02

    Dry to a pellicle

    Set the mackerel apart on a wire rack and leave them uncovered in the fridge for 45 to 60 minutes, or in front of a fan on low for 30. The skin should feel dry and slightly tacky: that pellicle is what grips the smoke and builds the colour. Put the fish in wet and the smoke slides off, leaving the skin grey.

  3. 03

    Set up the kamado

    Light the charcoal in a single spot with one firelighter and leave the lid open for five minutes. Close it, fit the Big Green Egg ConvEGGtor legs up and slide a tray under the grate to catch the drips. Open the bottom vent a finger's width and the top one barely a slit. Climb slowly towards 120 °C: if the ceramic overshoots 150 °C, bringing it back down takes half an hour.

  4. 04

    Cherry and blue smoke

    Once the chamber settles near 120 °C, set a Grill Republic cherry chunk half-buried next to the lit spot and close the lid (if chips are all you have, wrap them in foil with four or five holes: loose on the coals they flame instead of smoking). Give it two or three minutes: thick white smoke comes first, then a thin, almost transparent blue thread. That is the moment to put the fish in, never before, because white smoke is what turns it bitter.

  5. 05

    Lay the mackerel in

    Oil the grate and the skin of the fish. Stuff each mackerel with a slice of lemon, a sliver of garlic and a sprig of dill. Lay them belly down, two fingers apart, heads facing the same way, and close the lid. Do not touch them for the first 20 minutes: the skin has to set before it will release from the bars on its own.

  6. 06

    Smoke without peeking

    Hold the chamber between 110 and 125 °C throughout, correcting only with the bottom vent and in tiny increments. The Inkbird IBT-4XS lets you watch grate and fish temperature at once without lifting the lid. Every time you open it you lose the smoke you have built and about ten minutes of stability, so curiosity is expensive here.

  7. 07

    Check the doneness

    At 40 minutes, probe the thickest part of the loin next to the backbone: you want 62 to 65 °C. The flesh should look opaque right to the bone and flake under gentle pressure, and the skin should be taut, glossy and dark copper. If it falls short, give it another 5 or 10 minutes; a 350 g mackerel rarely needs more than 50.

  8. 08

    Rest and fillet

    Lift the mackerel out with two spatulas and rest them 10 minutes on a rack: straight off the grate they fall apart at a touch. With an Arcos Universal fish knife, open them along the spine, lift the fillet away whole and pull the backbone out in one go from the head end. Serve with lemon, flaky salt and bread, or cool them completely for the next day.

About this recipe

Mackerel is one of the most honest fish on the slab at Torrevieja or Santa Pola market: reliable all year, oily, with a flavour firm enough to take smoke without vanishing underneath it. That same oil has made it the home-smoked fish of half of Europe, and in the Russian-speaking world скумбрия горячего копчения turns up in every market. Here we do it whole, on the kamado, in under an hour.

How this differs from cold smoking

True cold smoking — the kind behind sliced salmon — cures the fish in salt for days and never lets the smoke above 30 °C: the flesh never sets, it stays raw, gets sliced thin and is eaten like a charcuterie. This is the opposite. The mackerel goes in whole, the kamado sits at 120 °C and the fish cooks and smokes at the same time. Forty-five minutes later it is on the table, hot, flaking apart.

The temperature ceiling is everything

The whole trick here is restraint. Between 105 and 130 °C the oil renders slowly and soaks the flesh from within; above 130 the skin tightens faster than the flesh gives way, it splits, and the fish ends up steamed rather than smoked. With the ConvEGGtor in and the vents nearly shut, my Big Green Egg Large parks at 118-122 °C on a single firelighter in one spot of the charcoal. One Inkbird IBT-4XS probe at grate height and the other in the loin, and there is no reason to lift the lid.

Cherry or alder, with a light hand

Alder is the reference wood for Russian and northern European smoking, and cherry is its best stand-in here in Spain: sweet, gentle, and it leaves that dark copper on the skin that makes the fish look varnished. A handful of Grill Republic premium cherry chips is enough for the entire cook, and they must smoulder rather than catch fire. If the smoke comes out white and thick the mackerel will taste bitter; wait for that thin, almost invisible blue thread before the fish goes in.

In 30 seconds

Whole mackerel in a 10% brine for 30 minutes, rinsed and air-dried until the skin is tacky. Kamado with the deflector in, 120 °C and a handful of cherry wood smouldering. 40-50 minutes to 63 °C in the loin, next to the backbone. Ten minutes' rest, then to the table with lemon.

Editor's tips

  • Drying is not optional: without a tacky pellicle the smoke slides off and the mackerel turns out grey, tasting of ash rather than cherry.
  • Light one spot of charcoal only and creep up to 120 °C from below; ceramic stores so much heat that correcting an overshoot costs more than starting again.
  • Choose mackerel of matched size, 300 to 400 g. Mix big and small ones and the small ones dry out while you wait for the rest.
  • One handful of chips is enough. Adding wood halfway through only adds bitterness, because the fish takes up almost all its smoke in the first twenty minutes.

Gear for this recipe

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FAQ

  • What temperature do you hot-smoke mackerel at on a kamado?

    Between 105 and 130 °C, aiming for 120 °C with the deflector always in place. At that temperature a whole mackerel of around 350 g needs 40 to 50 minutes, until it reaches 62-65 °C in the loin beside the backbone. Above 130 °C the skin bursts and the fish steams instead of smoking.

  • Do I need to freeze the mackerel first because of anisakis?

    Not if you cook it through. Hot smoking takes the inside of the fish above 60 °C, and that heat destroys anisakis larvae. The prior freezing at -20 °C for 24 hours required by Spain's AESAN applies to fish eaten raw, marinated or cold-smoked, not to this recipe.

  • Which wood works best with mackerel?

    Alder, cherry, apple or beech — and in chunks rather than chips. These are sweet, gentle woods that go with the oil of an oily fish instead of smothering it, and cherry leaves a lovely copper tone on the skin. Avoid mesquite and hickory: their smoke is far too aggressive for mackerel and turns it bitter.

  • How is this different from cold smoking?

    In cold smoking the fish is salt-cured for days and the smoke never goes above 30 °C: it stays raw, is sliced thin and eaten like classic smoked salmon. In hot smoking the fish cooks and smokes at the same time at 120 °C and is ready in under an hour, served whole and flaking.

  • How long does smoked mackerel keep, and how should I store it?

    Two or three days in the fridge, in an airtight container and away from everything else, because the smoke smell travels to whatever sits near it. It improves after a few hours of chilling: the oil settles and the smoke evens out. It also freezes for up to a month, boned and wrapped piece by piece.

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