Barbecue Prime Rib

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Introduction

Smoking a prime rib low and slow produces a tender, deeply savory roast with a smoky ring that reaches the bone. This recipe uses mesquite smoke and a two-stage cook—low smoking followed by a quick high-heat sear—to develop both smoke flavor and a crispy crust in under 4 hours total.

Recipe Details

• Prep Time: 10 minutes
• Cook Time: 3 hours 30 minutes
• Total Time: 3 hours 40 minutes
• Servings: 6–8

Ingredients

• 1 ea. 4-bone standing rib roast, prime grade
• Prime Rib seasoning, as needed
• Canola oil, as needed
• Large mesquite chunks

Instructions

1. Coat roast with oil. Shake on seasoning and massage into meat.
2. Place dry mesquite chunks into firebox of a 250°F smoker.
3. Insert a probe thermometer into center of roast and set for 118°F.
4. Place roast into smoker and lower heat to 200°F. Cook until internal temperature is achieved, changing mesquite as needed.
5. Remove and grill on high heat for 7 minutes or until desired crust is achieved.
6. Remove and let rest 10 minutes. Serve.

Variations

Hickory smoke instead of mesquite: Swap mesquite chunks for hickory for a milder, slightly sweeter smoke flavor that’s less peppery and works well if you prefer a gentler smoke profile.

Reverse-sear method: Cook the roast entirely in the smoker to final temperature, then skip the grilling step and finish with a 2-minute sear in a cast-iron skillet on the stovetop over high heat for convenience.

Butter baste after smoking: During the final 30 minutes of smoking, brush the roast every 10 minutes with melted butter mixed with fresh garlic and thyme to add richness and aroma before the sear.

Coffee-rubbed variation: Mix Prime Rib seasoning with finely ground coffee and cocoa powder before coating the roast to deepen the savory notes and add subtle earthiness.

Hot-smoked finish: Instead of grilling, place the roast directly over mesquite coals at 400°F for 5 minutes to char the exterior while keeping smoke flowing throughout.

Tips for Success

Oil the roast thoroughly before seasoning. A light coating of oil helps the dry rub adhere evenly and prevents it from falling off during the long smoke.

Use a reliable probe thermometer. At 200°F, the roast cooks slowly; a thermometer prevents guessing and ensures you stop at rare (118°F internal) before it dries out.

Change mesquite chunks halfway through. Mesquite burns fast and produces ash; replacing chunks at the 1.5-hour mark keeps smoke clean and consistent.

Let the roast rest after searing. The 10-minute rest allows carryover cooking and lets juices redistribute, so each slice stays tender and juicy rather than leaking onto the plate.

Don’t skip the high-heat sear. The 7-minute grill finish creates the crust; without it, the exterior stays pale and soft despite the long smoke.

Storage and Reheating

Store leftover roast wrapped tightly in foil or in an airtight container in the refrigerator for up to 4 days. Frozen roast keeps for up to 3 months.

FAQ

How do I know when the roast is done if my probe thermometer fails? Use an instant-read meat thermometer inserted into the thickest part of the roast without touching bone; 118–125°F is rare, 130–135°F is medium-rare. Check multiple spots since temperature varies across the roast.

Can I use a charcoal or gas grill instead of a dedicated smoker? Yes. Set up a charcoal grill for indirect heat by placing coals on one side and the roast on the other, or use a gas grill on low with the burner opposite the roast. Place mesquite chunks in a foil packet with holes poked in it directly over heat to create smoke.

What if I don’t have mesquite chunks? Oak, hickory, or cherry chips work well as substitutes and will produce a milder, fruitier smoke; soak them in water for 30 minutes before adding to extend burn time and increase smoke output.

Should I wrap the roast in foil during smoking to speed it up? Wrapping after the first 1.5 hours (once the smoke ring has formed) will speed final cooking by 20–30 minutes and prevent excessive bark formation if you prefer a thinner, more tender exterior.