The Cajun microwave — despite the name, nothing to do with microwaves — is a large wooden or metal box (approximately 90cm × 60cm × 60cm) with a charcoal tray on top. The meat sits inside the box on a rack; the charcoal burns on the lid above it. The heat radiates downward, and the box's insulated walls trap it, creating an oven that slow-roasts a whole pig, a turkey, a brisket, or a lamb from above. The design is a Cajun adaptation of the Cuban *La Caja China* (the Chinese box) — a roasting box that Cuban immigrants brought to the Americas and that was adopted and modified by Cajun outdoor cooks in the second half of the 20th century. The name "Cajun microwave" is ironic humour — the device is anything but fast, requiring 4-8 hours for a whole pig.
A box-shaped outdoor roaster where heat comes from above (charcoal on the lid) and the meat sits below, surrounded by insulated walls. The meat roasts slowly in its own juices — the drippings fall downward (away from the heat source), collect in the bottom of the box, and the closed environment creates a combination of roasting and steaming that produces extraordinarily moist, evenly cooked results. A whole pig emerges from a Cajun microwave with crackling skin on top (closest to the heat) and fall-apart tender meat throughout.
A whole pig from a Cajun microwave is a party centrepiece — the box is opened in front of the guests, the pig is revealed, and the meat is pulled and served communally. Accompaniments: potato salad, coleslaw, baked beans, French bread, hot sauce, Creole mustard. Cold beer by the case. This is outdoor social cooking in the same tradition as the boucherie (LA1-10), the crawfish boil (LA1-07), and the Southern pig roast.
1) Charcoal on top, meat on bottom — the inversion of conventional roasting. The heat radiating downward crisps the skin while the closed box environment steams the underside. The fat renders downward, away from the heat, basting the meat as it falls. 2) Temperature management through charcoal quantity. More charcoal = higher heat. A whole pig (30-40kg) needs approximately 8-10kg of charcoal, refreshed every 60-90 minutes by adding fresh coals. Target temperature inside the box: 120-135°C for low-and-slow. 3) The box must be closed and sealed during cooking. Opening the box loses heat and extends cooking time dramatically. Check temperature with an external probe thermometer that reads through a small hole in the box wall. 4) Seasoning goes on the meat before it goes in the box — aggressive Cajun seasoning rubbed into every surface, ideally overnight. The long, slow cook gives the seasoning time to penetrate deeply.
The Cajun microwave produces the best whole roast pig most people will ever eat. The combination of top-heat crisping and bottom-moisture steaming is difficult to achieve with any other method. The skin crackles; the meat is tender throughout; the juices collect in the bottom of the box and can be used as a serving sauce. Injecting the meat — using a syringe to inject seasoned liquid (stock, garlic butter, Cajun seasoning dissolved in stock) deep into the thick sections of the pig ensures seasoning reaches the centre. This is standard practice for large pieces in the Cajun microwave. The box can be home-built from marine plywood lined with aluminium sheeting, or purchased commercially. Commercial versions (often literally branded "Cajun Microwave" or "La Caja China") are widely available in Louisiana and the Gulf South. Turkey in a Cajun microwave — brined, seasoned, and roasted for 3-4 hours — is the Cajun Thanksgiving alternative to the oven-roasted bird. The skin is crispier and the meat is moister than any oven can produce.
Too much charcoal at the start — the initial heat spike can char the skin before the interior begins to cook. Start with a moderate amount and build. Opening the box frequently — every opening costs 10-15 minutes of recovery time. Trust the thermometer. Not enough seasoning — a whole pig is a large mass of meat. The seasoning must be applied heavily to compensate for the ratio of surface to interior.
John Folse — Encyclopedia of Cajun & Creole Cuisine; Rien Fertel — The One True Barbecue