What Is a Green Egg Grill and How Does It Work?

A Green Egg grill is a ceramic kamado cooker that burns charcoal and controls heat with two vents — the bottom draft door and the top vent — to hold anywhere from 200°F to 700°F.

For the full breakdown, see our best Barbecue Egg Grill guide.

How does a thick ceramic shell turn lump charcoal into a steady 225°F overnight smoke, then crank past 600°F for a steak sear? The answer is the ceramic body and the air you let in. Whether it’s worth the price comes down to what that design does for your cooking.

What Makes the Big Green Egg Different From a Standard Charcoal Grill?

A Big Green Egg is a kamado — a thick-walled ceramic cooker modeled on traditional Japanese clay ovens, not a thin steel kettle. The ceramic shell soaks up heat, holds it, and releases it slowly, so the cooker runs for hours on one load of lump charcoal. The sealed body also traps moisture, so brisket, pork shoulder, and whole chickens come off juicier than on an open grill. Big Green Egg describes it as a “premium kamado grill,” and the build quality is where the price difference shows.

Steel grills shed heat through thin walls and leak air around loose lids. Ceramic does neither. Close both vents and the fire starves and dies on its own — the same airtight seal that snuffs the coals makes long, unattended cooks possible.

How Does a Big Green Egg Grill Actually Work?

An Egg burns lump charcoal in a firebox at the bottom, metering oxygen through the lower draft door and the upper daisy-wheel vent — more air means more heat, less air means less. Big Green Egg’s temperature range runs from 200°F up to 700°F (100°C–400°C). Every step follows the same airflow logic:

1. Fill the firebox with lump charcoal and light it — a fire starter cube in the center works well.
2. Open the bottom draft door and top vent wide to let the fire establish, about 10 minutes.
3. Close the lid and let the temperature climb toward your target.
4. Start shutting down the vents roughly 50°F before you hit target, because a ceramic Egg overshoots if you wait.
5. Fine-tune with small vent adjustments — the bottom door drives the big swings, the top wheel handles the trim.

Two habits keep it accurate: keep the felt gasket and vent seals in good shape so air doesn’t sneak past them, and resist chasing every 5-degree drift. Ceramic holds temperature so well that the Egg mostly stays put once it settles.

Which Sizes Does the Big Green Egg Come In?

Big Green Egg sells seven main sizes, from the portable Mini to the 2XL, with prices climbing along with cooking area. Size drives accessory fit, charcoal load, and how many people you can feed. Sizes, accessories, and fits vary by model and region, so match any accessory to your exact Egg size before buying; the regional “Getting Started” hubs carry downloadable manuals and setup videos. If you’re weighing which size or bundle fits your cooking, a closer look at how the leading ceramic egg grills compare side by side can save you from buying twice.

What Should You Know Before Buying One?

A Big Green Egg is a long-term investment, not a weekend impulse buy — the ceramic body is heavy, and bigger models run past 200 pounds. The tradeoff is durability: a ceramic kamado kept covered and handled carefully can last decades, since there’s no thin metal to rust through. The main ongoing costs are lump charcoal and accessories, which add up fast if you go deep into the ecosystem. Skipping the lid-open-and-poke habit also keeps fuel costs down — every peek releases heat you spent time building.