Charcoal and grill: a practical guide to cooking with fire

Charcoal grilling uses two types of heat at once. The coals themselves radiate intense heat upward, and when you put the lid on, convective heat circulates around the food inside the cooking chamber. That combination is why charcoal can sear a steak fast and also hold a steady low temperature for hours.

The numbers are worth knowing. ThermoWorks reports that the fire bed itself can reach around 1200 F, while the grate surface above a full chimney of lit coals sits closer to 600-650 F. That grate temperature is what matters for your food. Understanding this gap helps you place food at the right distance from the coals for the cook you want.

You have two main choices at the store: briquettes and lump charcoal. Briquettes are compressed and burn at a consistent temperature for a long time, which makes them good for low-and-slow cooks. Lump charcoal lights faster, burns hotter, and produces less ash, but it burns less evenly. Many backyard cooks keep both on hand.

A chimney starter is the cleanest way to light either type. Fill it, set it over a crumpled piece of newspaper or a fire starter cube, and light the bottom. In about 15-20 minutes the top coals will be glowing orange with a light gray ash coating. That ash coating means the coals are ready. Lighter fluid works but can leave a chemical taste if you add food before the fluid burns completely off.

• Use a full chimney for high-heat direct searing
• Use a half chimney for medium-heat cooking or shorter cooks
• Use a half chimney banked to one side for indirect low-and-slow cooks
• Add unlit coals next to lit ones for longer cooks, a method called the Minion method

The most useful skill in charcoal grilling is the two-zone fire. Push all your lit coals to one side of the grill. That side is your direct zone, hot enough for searing. The other side, with no coals under it, is your indirect zone, where food cooks from circulating heat with the lid on. You can sear a chicken thigh over direct heat and then move it to the indirect side to finish cooking without burning the outside.

For smoking or any low-and-slow cook, the indirect side is where your food lives the whole time. Keep the lid on, crack the vents to control airflow, and according to the USDA hold the pit air temperature between 225 and 300 F throughout the cook. A clip-on grate thermometer or a leave-in probe away from the coals gives you that reading. Do not rely on the lid thermometer alone because it reads the air near the dome, not near the food.

Cook time is a rough guide. Internal temperature is the real answer. Every protein has a minimum safe temperature, and hitting that number is the only way to know the food is safe to eat. Pull temperature is slightly lower than your target because carryover cooking adds a few degrees after the food leaves the heat. For steak, ThermoWorks advises pulling it 3-5 F below your target doneness temperature to account for that rise.

The USDA safe temperature chart gives you the minimums for every protein. Here are the numbers you need at the grill:

• Whole beef, pork, veal, and lamb: 145 F with a 3-minute rest
• Ground beef and ground pork: 160 F
• Whole poultry, ground poultry, and poultry parts: 165 F
• Fish and shellfish: 145 F
• Leftovers and casseroles: 165 F

Your vents are your throttle. More airflow means more oxygen, which means hotter coals. Open both the bottom vent and the top vent wide for high-heat searing. Close them down to about a quarter open for low-and-slow smoking. The top vent controls how much heat escapes. Closing it too much starves the fire of oxygen and can produce bitter, acrid smoke. Leave the top vent at least slightly open at all times.

Bob's most common mistake is lifting the lid every few minutes to check the food. Every time you lift the lid, you lose heat and add time to the cook. On a low-and-slow cook, resist the urge to peek more than once every 45-60 minutes. Use a leave-in probe thermometer so you can watch the temperature without opening the grill. For more on building a solid charcoal cook from start to finish, the smoked chicken thighs guide and the 3-2-1 ribs guide both walk through real cooks with specific vent settings and temps.