Grilling: Distance, Zones, and Flare-Ups

On a grill the heat is radiant, so distance is temperature

A pan cooks by contact (conduction). An oven cooks by moving hot air (convection). A grill cooks by radiation — and radiant heat falls off with the square of the distance.

Double the gap between fire and food and the heat drops to a quarter. The real control on a grill is not the burner setting, it is the height of the grate and where on it the food sits. That one fact is most of grilling.

Taken to its limit, that is asado al asador — the version of Asado where a whole side of ribs is strapped to an iron cross, stood upright well away from the coals, and cooked by radiant heat alone for three to five hours. No grate and no turning; the only control is the angle you lean the cross at.

A charcoal fire is not a heat source until the fuel says so

Everything above starts from a fire that is already burning steadily. A gas burner is that the moment you light it; a charcoal or wood fire is not, for the first half hour or so of its life. What tells you it has arrived is neither a clock nor a thermometer but the appearance of the fuel itself, and the dishes that cook over fire say so in their own words.

• Kenyan Nyama Choma calls it the commonest failure there is. "Wait for the white ash. The commonest failure is putting meat over coals that are still flaming: the outside chars while the inside stays raw, and there is no recovering from it." Its own step puts the wait before the raking — light the charcoal, wait until it is covered in white ash, and only then rake the coals to one side. The zones come after that, not instead of it.
• Asado gives the clock for wood. Stack it upright and burn it 30 to 45 minutes, "until the red flames are gone and what is left is coals under a coat of grey ash. Meat never goes over flames in an asado." Its tips open with "the fire is the recipe — almost everything that goes wrong with an asado goes wrong at the fire."
• And it is still the first instruction where the dish's real difficulty is something else. Jangeo-gui is a fatty fish whose problem is dripping fat catching light, and Galbi a sweet marinade that blackens; both begin the same way, once the coals have greyed over.

The mechanism is this guide's own, one section down. A luminous flame is incomplete combustion, and what that leaves on a surface is already set out under flare-ups. A bed that is still flaming is that same fault running under the whole grate at once rather than in the one patch below a drip of fat — which is why nyama choma says there is no recovering from it. It also settles the water: throwing ash up and making the coal bed uneven is undoing the very state you waited for.

There is no dial, so the reading is your hand

A fire being ready does not say how hot it is, and a grill has no setting to consult. Both ends of that scale are written down in the recipes.

• Asado wants gentle radiance held for over an hour, and gives five to seven seconds of palm tolerance at grilling height.
• Anticuchos is beef heart at two minutes a side, so the colour has only that long to arrive: "you should not be able to hold a palm 20cm above it for two seconds."

What you do with the reading is what a dial would otherwise have handled. Asado looks for the answer in the fuel: "spread the coals in a thin layer under the grill, do not heap them … less than that, spread the coals further; comfortable past ten seconds, add more." So beside the height of the grate and where on it the food sits, from the opening of this guide, there is how thickly the fuel is laid. Banking the coals to one side, below, is that same lever used to make two intensities at once instead of one.

This is not the pan test in heat control. Ripples in oil, a sound, one breadcrumb — those read the cooking surface, and that guide's point is that the reading falls the instant food lands on it. Here there is no surface to read and nothing has been put anywhere yet; what is being judged is whether the fire is a fire. One other thing is settled at this stage and cannot be revisited later, which is what the fuel is: asado notes that lump charcoal gives "less aroma, but steadier temperature", while "lighter fluid and briquettes leave their smell in the meat." At this stage the fuel is an ingredient.

Build two zones

Charcoal or gas, start by making a hot zone and a cool zone: bank the coals to one side, or light only half the burners.

• Thin food (under 1.5cm) — starts and finishes on the hot side. Yakitori, yakiniku, bulgogi. The outside colours in the time the inside needs.
• Thick food — comes up to near its target on the cool side, then takes its colour on the hot side at the end. Do it the other way round and the outside burns before the middle is done (cooking meat).

Without zones you have no control at all, and nothing to do about burning except keep flipping.

A flare-up means you are already late

Fat dripping into flame is not "a good sear developing". Those flames deposit soot — carbon from incomplete combustion — onto the surface of the meat. The smell of browning and the bitterness of soot are unrelated things.

The fix is not a squirt of water, it is moving the food to the cool zone. Water throws ash up and makes the coal bed uneven. Fatty cuts should start on the cool side in the first place.

Two ways to keep the fat out of the fire in the first place

Nigerian Suya is rubbed with ground peanut, and that peanut has had its oil pressed out (kuli-kuli). Roasted peanut is about half fat, so ground onto meat over a fire it melts and runs — and what runs down is exactly the flare-up above. Defatted, the powder stays where it is put and toasts instead.

Satay solves the same problem the opposite way: the peanut sauce never goes near the fire and is poured over after grilling. One answer changes the ingredient, the other changes the order.

Where the fat is the ingredient, as in Samgyeopsal-gui, there is nothing to avoid — a cool zone and changing the grate often is the whole of the answer.

When the charred surface is not the one you eat

Everything above assumes the surface meeting the fire is the surface that reaches the plate. That is what makes distance a control on colour, what makes a flare-up a fault, what makes waiting for the flames to die the first step, and what puts a sugary glaze in the last two minutes. Where the blackened part is thrown away, none of that binds and the instruction reverses. Chile Relleno chars the poblano "until the skin is blackened and blistered all over. Do not be timid — what burns is the skin, not the flesh," and Shopska Salad says the same of its peppers: "don't be shy about letting the skin go black — you're peeling it off anyway." On anything you were going to eat, both are well past saving. And what both in fact specify is a flame — a luminous fire only costs you something on a surface you are going to eat.

What the distance rule measures changes with it. It is no longer how fast the surface colours against how fast the centre cooks, but how much heat has to get through a barrier — and that depends on whether what is under the barrier has to cook at all.

• Through it. Baba Ghanoush wants the aubergine completely soft, and its page turns the charring around: the blackened skin is "a wrapper, not a surface", thrown away entire, so the fire's job is to send smoke through a skin into flesh that never touches it. Its step gives both routes to one endpoint — 30 to 40 minutes in a 220°C oven, "faster over flame" — so there is nothing on the surface to protect and no cool zone in it; the fiercest heat to hand is simply the quickest.
• Stop at it. A poblano has to stay firm enough to stuff and a pepper firm enough to tear into strips, so ten to fifteen minutes of fierce heat is the whole of it: long enough to destroy the skin, short enough to leave the wall.

And the blackening is not merely tolerated — it is how the skin comes off. Both pepper dishes go straight from the fire into a covered bowl for ten minutes and let the trapped steam lift the skin away by itself, which is a heat step taken to make one layer let go of the next, as blanching does with water and a whole onion. Rinsing them afterwards undoes the point of it, and Chile Relleno has a second reason not to: a wet chilli takes no batter.

Further out again is an ingredient charred and then discarded whole. The onion and ginger blackened over a flame for Pho are simmered for two or three hours and fished out, and that page calls the blackening "the secret to pho's signature aroma" — the char here is a flavour to be extracted rather than a price to be managed.

None of this is a surface deliberately taken to the edge of burnt and then eaten — a Canelé or a Basque Cheesecake, where the bitterness is part of the taste and the edge has to be judged (using your oven). Here nothing burnt reaches the plate, which is why the instruction can simply be not to be timid.

Skewers solve two problems at once

A skewer is a tool, not a presentation.

• It forces uniform size. Pieces cut alike on one skewer finish alike.
• It lets you turn everything at once. Turning small pieces individually means the first ones are burning while you work on the last.

Two practical notes: soak bamboo skewers thirty minutes so they do not burn, and thread two side by side so the pieces cannot spin when you turn them. There is a reason souvlaki, satay and yakitori are all skewer dishes.

There is a third job as well: it puts things on the fire that could not sit on a grate at all. Kabab Koobideh is minced meat pressed onto a flat steel skewer by hand. Here the skewer is not about uniformity or convenience, it is the only thing holding the shape — which is also why it is flat. On a round skewer the meat spins as you turn it and falls off.

Anticuchos is a different reason again. Beef heart has no intramuscular fat, so there is no margin at all and two minutes a side is the entire cook. There simply is not time to turn pieces one at a time.

Sugar in the marinade goes on at the end

Sugar, mirin, honey and fruit juice start burning around 150°C, and the surface of food over direct fire is far hotter than that.

So a sugary glaze belongs in the last two or three minutes, brushed on in two or three coats. Applied from the start it blackens before the centre is cooked. That is why yakitori tare is layered on repeatedly as it cooks, and why marinated bulgogi does better if you shake the marinade off before it hits the grate and brush the rest on later (what marinades do).

Salted meat and marinated meat are different dishes

Same grill, opposite approach.

• Salt only — yakiniku grills bare and gets dipped afterwards. With no sugar on the surface you can use full heat and chase colour freely. Salt goes on just before it hits the grate (salt and seasoning).
• Marinated — bulgogi, jerk chicken, tandoori chicken: the marinade is the identity. This side wants medium heat, more time, and active management of the burning risk.

Yogurt-marinated tandoori chicken sits between the two — the milk protein scorches readily, but it also clings and keeps the meat from drying.

A third approach: a dry powdered rub

The yaji on Suya has no liquid in it at all, and the two sections above turn out to be its whole explanation.

• There is no sugar in it. So full heat is available from the start — "sugar goes on at the end" has nothing to apply to.
• The peanut has been defatted. So nothing drips and nothing flares.
• Dry aromatics do lose their volatiles to heat, so half the rub goes on before the fire and half is dusted on after. The first half becomes crust; the second half stays as aroma.

Where a marinade puts flavour in over time, this builds a layer on the surface. Kenyan Nyama Choma is the far end of the same line, using little beyond salt.

Half the work happens after it comes off

• Thick cuts rest. Five to ten minutes lets the juice redistribute (cooking meat).
• Thin cuts do not rest. They only get cold. Eating yakiniku straight off the grill is correct.
• Slice against the grain. With something pre-sliced like bulgogi that decision was made before cooking.

Table grilling runs on different rules

Where the eater does the grilling — Samgyeopsal-gui, yakiniku — most of the above does not apply. There are no zones (one plate, one temperature), there is no rest (it is eaten straight off), and the doneness decision moves from the cook to the person eating.

The format then decides the ingredient: pieces have to be small and thin, since without zones there is no way to cook a thick one through; the seasoning becomes a dip rather than something brushed on; and scissors become a required tool. A dish with a designated griller goes the other way — Jangeo-gui builds its lacquer by brushing tare on in repeated coats.

Approximating it indoors

You cannot fully reproduce a grill without one — the radiant intensity and the smoke are both missing.

The closest thing is a cast iron grill pan, properly preheated (heat control), and an oven's broiler gives you radiant heat from above, which means the distance rule transfers directly. With a pan the thing that matters most is not crowding it: crowded, the steam has nowhere to go and the food steams instead of grilling.