Butterflied, brined overnight in buttermilk and Cajun spice, smoked low and slow on the Traeger with apple wood, then finished skin-side down on a screaming hot Weber kettle. The charcoal finish does what the Traeger can't — crisps the skin and builds the crust. The fire sauce ties it all together.
I've been cooking whole chickens on the Traeger for years. The problem was always the skin — the Traeger runs at 250°F, and even cranked up it can't generate the direct radiant heat you need to render subcutaneous chicken fat and get a proper crust. Spatchcocking was part of the answer: flatten the bird so every inch of skin faces the same heat. But the real unlock was the Weber kettle finish.
Three to four minutes on lump charcoal at 600°F+, skin-side down, does what the Traeger alone never could — renders the fat, builds a crackling crust, and adds a subtle char that's completely different from smoke. You're not re-cooking the chicken. You're finishing it. The Traeger gets it to 155°F internal and does all the smoke work. The Weber does the last few minutes and changes everything about the texture.
The buttermilk-Cajun brine comes from time spent eating my way through Louisiana. Buttermilk is the standard poultry brine down there — mild acid, deep tenderizing, and it carries spice into the meat better than water ever will. The fire sauce is Cajun butter heat: no ketchup, no sweetness, just cayenne, hot sauce, garlic, and butter. It's the same flavor profile I fell for eating Cajun food for two years and haven't been able to leave behind since.
— T-Bone, Smoke & Soul BBQ
Spatchcock the chicken (night before). Place the chicken breast-side down on a cutting board. Using heavy-duty kitchen shears, cut along one side of the backbone from tail to neck, then the other side. Remove the backbone entirely (save it for stock). Flip the bird breast-side up and press firmly on the breastbone with both hands until you feel and hear it crack flat. The chicken should now lie completely flat.
Make the brine and submerge. Combine buttermilk, Cajun seasoning, hot sauce, smashed garlic, and salt in a large zip-lock bag or container. Add the spatchcocked chicken, making sure it's fully submerged. Refrigerate overnight — a minimum of 8 hours, ideally 12–16. The buttermilk acids tenderize the meat while the spices carry flavor deep into every layer.
Prep for the smoke. Remove the chicken from the brine and shake off the excess. Do not rinse. Pat completely dry with paper towels — moisture on the surface will steam instead of allowing the skin to crisp. Using your fingers, gently loosen the skin over the breast and thighs and push a generous amount of House Rub directly under the skin onto the meat. Apply the remaining rub over the entire exterior, including the underside. Drizzle lightly with olive oil. Rest at room temperature for 20 minutes while the Traeger comes up to temperature.
Smoke on apple wood. Set the Traeger to 250°F with apple wood pellets. Place the chicken skin-side up on the grate. Apple wood is the right call here — it's mild and sweet, which complements the buttermilk brine without overwhelming it the way hickory or oak would. Smoke until the internal temperature in the thickest part of the thigh reads 155°F — approximately 90 minutes to 2 hours, depending on the bird size.
Make the fire sauce. While the chicken smokes, melt the butter in a small saucepan over medium-low heat. Add the minced garlic and cook for 1 minute until fragrant but not browned. Add hot sauce, cayenne, smoked paprika, honey, and apple cider vinegar. Whisk to combine. Simmer on very low heat for 5 minutes. The sauce should be glossy, bright orange-red, and taste of heat, butter, and a vinegar-bright edge. Season with a pinch of salt. Keep warm.
Finish on the Weber. Prepare a full chimney of charcoal and let it go until fully ashed over. Spread in an even, dense layer. You want the grate screaming hot — 500-600°F. Transfer the smoked chicken from the Traeger to the Weber, skin-side down. 3–4 minutes — watch it. The skin will render, crisp, and char in spots. You're looking for dark grill marks, crackling skin, and the smell of fat hitting hot coals. Flip for 60–90 seconds bone-side down to finish.
Glaze and rest. Pull the chicken from the Weber and immediately brush the fire sauce generously over the skin side. The heat will help the sauce tack into the surface. Rest uncovered on a cutting board for 8–10 minutes. This rest is shorter than brisket but still essential — the juices need to redistribute. Then carve into quarters — two legs and two breasts — and serve with the remaining fire sauce on the side.
Spatchcocking (also called butterflying) means removing the backbone of the chicken so the bird lays completely flat. With the backbone out, the whole chicken cooks in a single flat layer — the thick breast and the thin wing cook at the same rate, the skin gets even heat exposure, and cook time drops 30–40 minutes compared to a whole roasted bird. It's the right technique for smoking a whole chicken.
The Traeger smokes the chicken at 250°F with apple wood for flavor and moisture. But the Traeger can't crisp chicken skin well — it tops out around 450–500°F. The Weber kettle on lump charcoal at 600°F+ finishes the skin in 3–5 minutes, skin-side down: intense direct heat that renders the fat under the skin and builds a crispy, slightly charred crust the Traeger alone cannot produce.
At 250°F, a 3.5–4 lb spatchcocked chicken takes approximately 60–75 minutes to reach 155°F internal in the thickest part of the breast. After the Weber finish (3–5 minutes skin-side down), the chicken rests for 10 minutes and carries over to 165°F. The full cook from start to finish — including Weber finish and rest — is about 90 minutes total.
Fire sauce at Smoke & Soul is a Cajun butter sauce built on cayenne, hot sauce, garlic, and butter. It's not a BBQ sauce — no ketchup, no sweetness. It's more like a concentrated Cajun wing sauce: hot, rich, and bright. Brushed on the chicken just before serving, it also works as a table sauce for dipping. Heat level lands around medium-hot depending on how much cayenne you use.