Smoked Prime Rib: The Complete Reverse-Sear Guide (Temps, Times & Tips)
/This post contains affiliate links. If you buy through them, Delmarva Backyard may earn a small commission at no extra cost to you. We only recommend gear we actually use.
If there’s one cut that screams celebration, it’s a smoked prime rib. Tender, rich, and loaded with beefy flavor, a prime rib roast takes on smoke like a champ and rewards you with a juicy, edge-to-edge pink center that makes everyone at the table stop and stare.
I’ve smoked a lot of these on the Delmarva Backyard — Prime grade, Choice, and even a bargain Select roast — and this is the method I keep coming back to: dry brine, low-and-slow smoke, then a screaming-hot reverse sear. Below you’ll get the full recipe plus a temperature chart, a time-per-pound chart, how much to buy per person, and my quick au jus.
⏱️ Quick Answer: How to Smoke Prime Rib
Dry brine the roast with kosher salt for 24–48 hours. Smoke at 250°F until the center hits 120°F for medium-rare (about 30–35 minutes per pound). Rest 20–30 minutes, then sear at 500°F+ for 1–2 minutes per side. Final temp after resting: 130–135°F.
⭐ Why This Smoked Prime Rib Recipe Works
- 🧂 Dry brine seasons deep into the meat and dries the surface for a better crust
- 🔥 Low & slow at 250°F builds smoke flavor and cooks evenly edge to edge — no gray band
- 🧈 Tallow baste adds richness and amplifies that beefy flavor
- 🥩 Reverse sear gives you a steakhouse crust without overcooking the inside
- 🎯 Temperature-driven, not time-driven — beginner-friendly if you own a good thermometer
- 🍷 Built for holidays, birthdays, or any weekend worth celebrating
🥩 How to Choose the Best Prime Rib Roast
Prime vs. Choice vs. Select. “Prime rib” is the name of the cut (the rib primal), not always the grade. USDA Prime grade has the most marbling and is the most forgiving. Choice is what most grocery stores carry and still makes an excellent roast. Select is the leanest and cheapest — I tested one in Can A Select Grade Prime Rib Roast Be Tender and Juicy, and a dry brine plus careful temps goes a long way.
Bone-in vs. boneless. Bone-in has more flavor and the bones insulate the meat so it cooks a little more gently — plus it looks incredible on the table. Boneless is easier to slice and cooks slightly more evenly. Both work great with this method.
Ask for the “first cut.” Also called the loin end or small end (ribs 10–12), it has a bigger ribeye “eye” and less fat and connective tissue than the chuck end.
Trim and tie. Trim the fat cap down to about ¼ inch and tie the roast with butcher’s twine every 1–2 inches so it holds a round shape and cooks evenly. Most butchers will do this for you — just ask.
👥 How Much Prime Rib Per Person?
| Roast type | Per person | Example |
|---|---|---|
| Bone-in | About 1 lb, or 1 bone per 2 people | 4-bone roast (~8 lb) feeds 8 |
| Boneless | ½–¾ lb | 5 lb boneless feeds 7–10 |
Planning for leftovers (you should)? Add an extra pound or two.
Recipe
Smoked Prime Rib (Reverse Sear)
Dry-brined, smoked low and slow at 250°F, and finished with a screaming-hot reverse sear — juicy, edge-to-edge pink prime rib with a steakhouse crust.
Directions
Equipment: smoker + leave-in probe thermometer
- Dry brine: 24–48 hours ahead, coat the roast all over with kosher salt (about ½ tsp per pound). Set on a rack in the fridge, uncovered.
- Season: Pat dry, then coat generously with the pepper, garlic, onion, rosemary, and thyme. Let it sit at room temp 30–45 minutes while the smoker heats.
- Fire up the smoker: Preheat to 250°F with oak, pecan, or cherry. Wait for thin blue smoke. Set a foil pan underneath to catch drippings for au jus.
- Smoke to 120°F: Place bone-side down (fat-side up if boneless) with a probe in the thickest part. Smoke to 120°F for medium-rare (about 30–35 min per lb), basting with tallow halfway through.
- Rest: Pull the roast, tent loosely with foil, and rest 20–30 minutes while your grill or cast iron gets blazing hot.
- Reverse sear: Sear at 500°F+ for 1–2 minutes per side, fat cap included, until deep brown and crusty.
- Slice & serve: Remove the bones, slice ¾–1 inch thick against the grain, and serve with au jus and horseradish sauce.
🌡️ Smoked Prime Rib Temperature Chart
Pull the roast off the smoker 5–10°F below your target — it keeps climbing while it rests and during the sear.
| Doneness | Pull off smoker | Final temp after rest & sear |
|---|---|---|
| Rare | 115°F | 120–125°F |
| Medium-rare (recommended) | 120°F | 130–135°F |
| Medium | 130°F | 140–145°F |
| Medium-well | 140°F | 150°F |
Note: the USDA’s official safe minimum for beef roasts is 145°F with a 3-minute rest. Most pitmasters and steakhouses serve prime rib medium-rare.
⏲️ How Long to Smoke Prime Rib (Time Per Pound)
At 250°F, plan on roughly 30–35 minutes per pound to reach 120°F. At 225°F, plan on 35–40 minutes per pound. Thickness and your smoker matter more than weight, so always cook to temperature — and start early. A finished roast can rest wrapped for up to an hour without losing much heat.
| Roast weight | At 250°F | At 225°F |
|---|---|---|
| 4 lb | 2 – 2¼ hrs | 2⅓ – 2⅔ hrs |
| 6 lb | 3 – 3½ hrs | 3½ – 4 hrs |
| 8 lb | 4 – 4⅔ hrs | 4⅔ – 5⅓ hrs |
| 10 lb | 5 – 5¾ hrs | 5¾ – 6⅔ hrs |
| 12 lb | 6 – 7 hrs | 7 – 8 hrs |
Times are to a 120°F pull (medium-rare) and don’t include resting or searing.
🔥 Step-by-Step: The Details That Matter
1. Dry brine (24–48 hours ahead)
Coat the roast all over with kosher salt (about ½ tsp per pound) and set it on a rack in the fridge, uncovered. The salt pulls moisture out, dissolves, and gets reabsorbed deep into the meat — and the dry surface gives you a better crust. Short on time? Even overnight helps.
2. Season
Right before smoking, pat the roast dry and coat it with the pepper, garlic, onion, rosemary, and thyme. If you want the rub to stick better, use a thin layer of mustard or softened butter as a binder.
3. Fire up the smoker to 250°F
Oak is my go-to for beef. Let the fire settle until you’ve got thin blue smoke — not thick white smoke, which tastes bitter.
4. Smoke to 120°F
Bone-side down (fat-side up if boneless), with a leave-in probe in the thickest part of the center. Baste with melted beef tallow about halfway through. Resist opening the lid.
5. Rest 20–30 minutes
Tent loosely with foil. This lets the juices settle and gives you time to get your grill or cast iron blazing hot.
6. Reverse sear at 500°F+
Sear 1–2 minutes per side (fat cap included) until you’ve got a deep, dark crust. You can also crank the smoker to max or use a 500°F oven for 8–10 minutes.
7. Slice and serve
For bone-in, cut along the bones to remove them first, then slice the roast ¾–1 inch thick against the grain. Serve with au jus and horseradish sauce.
🥣 Quick Au Jus (From the Drippings)
- Drippings from the foil pan under the roast
- 2 cups beef stock
- ½ cup red wine (optional)
- 1 tsp Worcestershire sauce
- 1 sprig fresh thyme or rosemary
- Salt and pepper to taste
Skim the excess fat from the drippings. Add everything to a saucepan, simmer 10–15 minutes until slightly reduced, strain, and season to taste.
🌶️ Creamy Horseradish Sauce
Mix ½ cup sour cream, 2–3 Tbsp prepared horseradish, 1 tsp Dijon mustard, 1 tsp lemon juice, and a pinch of salt. Chill at least 30 minutes — or make it the day before to save time.
🔧 Pro Tips for a Perfect Smoked Prime Rib
- Probe the center of the thickest part, away from the bone.
- Pull early — prime rib climbs 5–10°F during the rest and sear.
- Buy a roast a little bigger than you need — leftovers are the best part.
- Don’t skip the tallow — it amplifies the meatiness and helps the crust.
- Keep your smoke clean and thin blue, never heavy white.
- Start early. A roast that finishes early can rest wrapped in a cooler for an hour. A late roast holds up dinner.
🌳 Best Wood for Smoking Prime Rib
- Oak — classic, balanced, my top pick for beef
- Pecan — nutty and smooth
- Cherry — mild smoke and a beautiful mahogany color
- Hickory — bold; use in moderation or blend with oak
🔄 Variations to Try
- 🧈 Garlic Herb Butter Crust: Mix softened butter, minced garlic, rosemary, and thyme and spread it over the roast before smoking.
- 🌶️ Spicy Crust: Add ancho chili powder and smoked paprika to the rub.
- 🍖 Texas Style: Salt, pepper, and garlic only — nothing else.
- ☕ Coffee Crust: Add 1 Tbsp finely ground coffee to the rub for a dark, rich bark.
🍽️ Leftovers & Reheating
Store sliced leftovers in an airtight container in the fridge for 3–4 days, or freeze for up to 3 months. To reheat without overcooking, warm slices gently in a covered pan with a splash of au jus over low heat, or in a 250°F oven until just warm. Leftovers also make killer prime rib sandwiches, steak and eggs, or French dips.
❓ Smoked Prime Rib FAQ
How long does it take to smoke a prime rib?
About 30–35 minutes per pound at 250°F, or 35–40 minutes per pound at 225°F, to reach medium-rare. A 6 lb roast takes roughly 3–3½ hours at 250°F. Always cook to internal temperature, not time.
What temperature should I smoke prime rib at?
225–250°F. I use 250°F — it’s still low enough for edge-to-edge color but saves time.
What temperature do I pull prime rib for medium-rare?
Pull at 120°F. After resting and searing, it finishes around 130–135°F.
Should I use bone-in or boneless prime rib?
Bone-in has more flavor and cooks a little more gently. Boneless is easier to carve and cooks slightly more evenly. Both work great.
How much prime rib do I need per person?
About 1 lb per person bone-in (or 1 bone for every 2 people), or ½–¾ lb per person boneless.
Should I wrap prime rib when smoking?
No. Leave it unwrapped the whole time so it takes on smoke and builds a crust. Only tent it loosely with foil while it rests.
What’s the best wood for smoking prime rib?
Oak for balanced flavor, cherry for mild sweetness and color, or hickory in moderation for a bolder smoke.
Can I smoke prime rib ahead of time?
Yes. Smoke to 120°F, rest, then hold it wrapped in a cooler for up to an hour and sear right before serving.
Is it worth buying a Prime grade roast?
Prime grade is the most forgiving, but a Choice roast makes an excellent smoked prime rib. Even Select can turn out great with a dry brine and careful temps.
🔧 Recommended Gear
- Pellet Smoker – Steady temps for perfect low-and-slow cooking.
- Instant-Read Thermometer – The most important tool for this cook.
- ThermoWorks Thermometers – Leave-in probes and the Thermapen ONE for dead-on temps.
- Dalstrong Chef’s Knife – Clean, even slices.