The two-zone fire: the one setup that fixes most barbecues
Most barbecue problems look different but share one cause: the whole grill is the same temperature. The outside burns before the inside is ready, fat drips and flares, and the only option is to keep flipping. A two-zone fire fixes that by giving you a choice on every piece of meat.
What a two-zone fire is
Pile the lit charcoal on one half of the grill and leave the other half empty. The side over the coals is your direct zone: intense heat for searing and colour. The empty side is your indirect zone: gentler, convective heat where thick pieces cook through without burning.
How to build it
- Light the charcoal in a chimney starter. Newspaper or natural firelighters work; skip lighter fluid, which can leave a taste.
- When the top coals are covered in grey ash, usually 15 to 20 minutes, pour them onto one side of the grill.
- Put the grate on and let it heat for 5 minutes, then brush it clean.
- If your grill has a lid, keep the vents open. With the lid closed, place the lid vent over the cool side so smoke and heat pass over the meat.
Test the heat with your hand
Hold your palm about 10 cm above the grate. The number of seconds you can keep it there is a reliable guide:
| Seconds | Heat | Use it for |
|---|---|---|
| 2 | Strong | Searing steaks, picanha slices |
| 4–5 | Medium | Sausages, chicken pieces, flank |
| 7+ | Gentle / indirect | Whole picanha, ribs, finishing thick cuts |
How to use the two zones
For a thick steak, sear on the direct side until both faces have colour, then move it to the indirect side to reach temperature gently. For a whole piece such as picanha or flank, do the opposite: cook it on the indirect side first and sear at the end, which gives an even colour inside and a crisp outside.
The cool side is also your safety valve. When fat starts to flare, move the piece away from the coals for a moment instead of spraying water on the fire.
Keeping it steady
A chimney of charcoal gives you roughly an hour of useful heat. For longer cooks, light a half chimney 20 minutes before you need it and add the lit coals to the hot side, rather than adding cold charcoal, which drops the temperature and smokes.