Direct vs Indirect Cooking in a Kamado: The Deflector

Direct cooking is the most primal: the food sits on the grate with the coals right underneath, nothing in between. Heat rises by radiation and hits the food head-on, so it's dry, aggressive and very high — easily 250-350 °C at the grate. It does one thing, but does it better than anything else: browning and searing the surface in a few minutes.

This is the method for a thin steak, a burger, vegetables, prawns, a duck breast. Anything that cooks fast and benefits from a toasted crust from the Maillard reaction. The mental rule: if the piece is cooked through inside before the outside burns, it goes direct.

The risk is obvious. At that heat, a thick cut chars on the outside long before the center reaches temperature. That's why a whole chicken, ribs or a brisket NEVER go direct: they're ruined in minutes.

In indirect cooking you slip the deflector between the coals and the food. The fire no longer touches the food: the deflector blocks the direct radiation, heats up and spreads the warmth throughout the closed dome. The result is convection heat, surrounding and even, like a wood-fired oven — between 110 and 200 °C depending on how you open the vents.

This is the method for almost anything that spends more than twenty minutes in the kamado: whole chickens, ribs, briskets, pulled pork, breads, focaccias, large roasts. Since nothing burns from below, the piece cooks evenly from the outside in and can sit for hours without risk.

It's also the foundation of smoking. With the deflector in and the vents nearly closed, you hold a steady 110-120 °C for hours (we cover this in our temperature control guide). Without the deflector, that same fire would spike the dome and char the piece. The deflector is what makes low & slow possible in ceramic.

The deflector — called a plate setter, conveggtor, heat deflector or "heat shield" depending on the brand — is a piece of refractory ceramic that sits above the charcoal basket, between the coals and the grate. Its job is twofold: to block the fire's direct radiation, and to re-emit that heat gently and spread it evenly through the dome.

There are two formats. The full or disc deflector (like the Big Green Egg conveggtor) covers the whole base: pure indirect, even heat across the grate. And the half-moon, which covers only half the kamado and leaves the other half with live coals beneath: it enables two-zone cooking — one indirect side to roast, one direct side to sear — without switching grills.

The ceramic isn't a gimmick: thanks to its mass and inertia, once hot it stabilizes the temperature and holds it even if the fire fluctuates. It is, literally, what sets a kamado apart from a sheet-metal barbecue.

Setting up the indirect zone well has a knack to it, and almost every failure comes from leaving no air between the deflector and the grate. The steps we follow on our terrace:

1. Light the charcoal and let the basket come up to temperature: for roasting, up to 160-180 °C; for smoking, the Minion method and close down toward 110-120 °C.

2. Place the deflector on the basket or its legs, curved face or legs down depending on the model. Keep it centered and stable.

3. Leave an air gap between the deflector and the grate. This is the critical point: if the food touches the hot ceramic, it burns by contact. Lift it with the raised supports.

4. For extra protection, set an aluminum tray on the deflector to catch the drippings and stop them from burning and turning the smoke bitter.

5. Fit the raised grate, close the lid and wait for the temperature to stabilize before putting the food in. Never load food while the dome is still climbing.

This is where the kamado becomes a precision instrument. With a half-moon deflector you cover only half the base: half the dome is indirect, the other half has live coals beneath. You have two cookers in one without touching the charcoal.

The star technique this unlocks is the reverse sear, our favorite for thick cuts. You cook the steak or the tomahawk in the indirect zone, slowly, until the center reaches about 48-50 °C; then you move it to the direct zone and sear it 60-90 seconds a side to build the crust. The result: even pink edge to edge and a perfect crust, without the gray band of a traditional sear.

It also helps you manage several things at different paces: sausages and vegetables direct while a chicken roasts indirect, all at once. Move from one side to the other with the tongs and you've multiplied what your kamado can do in a single cook.

This is the cheat sheet we have pinned in our heads every time we light up:

The two mistakes we see most. First: cooking direct what wants indirect. A chicken or ribs over the coals char outside and stay raw inside — always, no exception; those cuts want a deflector. Second, the opposite: leaving the deflector in to sear a steak. With ceramic in the way you never reach the heat blast that builds the crust, and you end up boiling the meat instead of browning it. Pull the deflector to sear. And a third, silent one: resting the food on the deflector with no raised grate, and scorching the base by contact.