Why Mackerel Belongs on the Woodland Fire

Mackerel is the camp cook's best friend. It is oily enough to baste itself, it cooks in minutes, and it takes smoke better than almost any other fish. If you have come off a coastal path or paddled a loch and the fish is still cool from the sea, a bed of woodland embers is the finest kitchen you will find all day. The only catch is that mackerel punishes hesitation: it is at its best within hours of being caught, and it goes from perfect to dry in about ninety seconds.

It also suits the way we actually cook outdoors. No marinades that need an hour, no long simmering, no heavy pans. A grate, a fire, a lemon and a knife will do it.

Choosing Fish and Preparing It

Buy or catch your mackerel the same day you plan to eat it. Look for bright, clear eyes, a stiff body, and that unmistakable green-and-black tiger striping over a silver belly. A fish of roughly 350–450g is ideal for one person; bigger ones are harder to cook evenly over a fire.

Gutting takes two minutes. Slit the belly from vent to gills, pull everything out, run a thumb along the spine to clear the dark line of blood, and rinse in cold water — stream or sea, whichever you happen to be next to. Leave the head on if you like; it keeps the fish juicy and gives you something to grip when turning. Pat it thoroughly dry with a cloth. Wet skin steams and sticks.

Score each side two or three times down to the bone with a sharp knife. This lets the heat in and stops the skin curling away. Season inside and out with plenty of coarse salt and black pepper, then rub a little oil into the skin. If you have a lemon, slice it and tuck two rounds inside the cavity with a sprig of thyme or some fennel fronds.

Building an Ember Bed, Not a Bonfire

This is where most camp grills go wrong. Mackerel wants steady, radiant heat. Flames will lick the skin black before the flesh is anywhere near done.

Burn hardwood: ash, oak, beech, birch or hazel. Avoid pine, spruce and anything resinous, which spits soot and tars your fish. Let the fire burn down for forty minutes or so until you have a good two-inch layer of glowing coals, grey on the outside, orange at the heart. Rake them flat with a stick, then let them settle for five minutes so the fiercest heat passes.

Hold your palm about ten centimetres above the cooking height. If you can hold it there for three seconds, the bed is right. One second means it is too hot — wait, or spread the embers wider. Five seconds and you will want another log on.

Set a grill grate on two green logs or a pair of flat stones, or rig it on a tripod so you can raise and lower it. Oil the bars well with a cloth.

Cooking the Fish

Lay the mackerel on the grate, at first a little further from the coals than its final position, and then leave it alone. Do not prod, do not fiddle. After two minutes, lift one edge with a thin knife: if the skin releases cleanly and is blistered and crisp, it is ready to turn. If it resists, give it another minute.

Turn once, using a fish slice or two sticks, and cook the second side for three to four minutes. A whole 400g fish takes roughly six to eight minutes in total; fillets take three to four minutes a side. The flesh is done when it flakes at the thickest point near the head and is opaque all the way through — no pink, no translucence.

• Keep the grate clean between fish; burnt skin taints the next one
• Cook in batches rather than crowding the bars
• Throw a handful of damp oak chips or rosemary sprigs on the embers for extra smoke
• Have a plate or board ready and warm before the fish comes off

What to Serve Alongside

Mackerel is rich, so keep the rest of the plate sharp and simple.

• Crusty bread or flatbreads warmed on the grate
• New potatoes boiled in a billy can with a pinch of salt
• A handful of sorrel, wild garlic or watercress tossed with oil and a squeeze of lemon
• Sea beet or samphire if you are cooking near the coast
• A dab of mustard or horseradish cream to cut the oil

Eat it hot, straight off the bone, with your fingers. Mackerel waits for no one.

Campcraft and Clearing Up

Keep your fire small and contained — a fire pit, a stone ring, or a raised tin. Check the rules of the land you are on before you light anything, and never leave a fire unattended. In dry summer woodland, sparks travel; keep water or sand within reach.

Once you have eaten, let the embers cool, then douse them properly and check with the back of your hand that no warmth remains. Scatter the cold ash, replace any turf you lifted, and take every bone, tin and lemon half home with you. Nothing marks a woodland campsite worse than the leftovers of a good meal.

Clean your grate with a handful of grass and a little sand while it is still warm — far easier than scrubbing it cold the next morning. Then sit back, let the fire die down, and enjoy the fact that dinner took less time to cook than the fire took to build.