Christmas dinner 2026
How to cook a standing rib roast (prime rib) for Christmas: size, timing, the pull temperature and carving
Buy one rib for every two people and roast bone-in at 350°F; the beef checkoff's chart gives about 1¾ to 2¼ hours for a 2-rib roast to medium-rare. Pull it at 135°F (medium-rare) or 145°F (medium) and rest it 15 to 20 minutes. USDA's safe minimum is 145°F plus a 3-minute rest.
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A standing rib roast looks like a showpiece, but the method is short: season it, roast it bone side down, take it out before it reaches the doneness you want, and let it rest. The beef checkoff publishes the roasting chart and pull temperatures most cooks work from, and USDA FSIS publishes the safety minimum. The numbers below come from those two sources, so you can plan the oven around them.
How much to buy
The beef checkoff's rule of thumb is one rib for every two people.
| Guests | Ribs | Roughly (bone-in) |
|---|---|---|
| 4 | 2 | 4–6 lb |
| 6–8 | 3–4 | 6–8 lb |
| 8–10 | 4–5 | 8–10 lb |
| 12 | 6 (a full rib section, or two smaller roasts) | 12+ lb |
If the roast is one of two mains, buy a rib fewer. Ask the butcher to cut the bones away and tie them back on if you want the easiest carving; the roast still stands on them in the oven.
The roasting chart (oven at 350°F, bone-in)
From the beef checkoff's roasting chart. Times are to the pull temperature, not to the final temperature after resting.
| Roast | Medium-rare (pull at 135°F) | Medium (pull at 145°F) |
|---|---|---|
| 4–6 lb (2 ribs) | 1¾–2¼ hours | 2¼–2¾ hours |
| 6–8 lb (2–4 ribs) | 2¼–2½ hours | 2½–3 hours |
| 8–10 lb (4–5 ribs) | 2½–3 hours | 3–3½ hours |
USDA FSIS lists a lower oven: 325°F for 23 to 25 minutes per pound for a 4–6 lb bone-in rib roast. For a boneless rolled rib roast, FSIS adds 5 to 8 minutes per pound. Ovens and roasts vary; start checking the temperature a good 30 minutes before the low end of the range.
Pull it early, then rest
The roast keeps cooking after it leaves the oven. The beef checkoff says to take it out at 135°F for medium-rare or 145°F for medium, tent it loosely with foil and rest it 15 to 20 minutes. It climbs 10 to 15°F while resting, ending around 145°F or 160°F.
USDA FSIS's safe minimum for beef roasts is 145°F, then a 3-minute rest. Many cooks serve rib roast rarer than that; the 145°F line is the one FSIS recommends, and it's the one to follow for anyone pregnant, older or with a weakened immune system.
Measure in the thickest part of the eye, not touching bone or fat. The thermometer guide covers the ice-water accuracy check, which matters more on beef than on turkey because the window is narrower.
A timeline for a 6 pm dinner (about 8 lb, medium-rare)
- Two to three days before: thaw in the fridge if frozen (FSIS: large roasts can take two or more days). Raw beef roasts keep 3 to 5 days in the fridge.
- The night before: season it all over with salt and pepper and leave it uncovered on a rack in the fridge so the surface dries.
- 2:30 pm: set the oven to 350°F. Put the roast bone side down in the pan, fat cap up, and set the probe alarm to 135°F.
- 2:45 pm: roast goes in. On the beef checkoff chart a 6–8 lb roast takes 2¼ to 2½ hours to medium-rare.
- 4:45 pm: start checking with the instant-read too. Sides that need the oven wait until the roast is out.
- About 5:15 pm, at 135°F: out, tent loosely, rest 15 to 20 minutes. This is when the oven goes up for potatoes or rolls.
- 5:45 pm: carve and serve.
The Christmas dinner timeline for 12 builds a whole one-oven day around a main like this.
Carving off the bone
- Cut the bones away first. Stand the roast on its end and run a long knife along the curve of the ribs, keeping the blade close to the bone. Save the bones for anyone who wants to gnaw.
- Turn it fat side up and slice across the grain into ½- to ¾-inch slices.
- Pour the board juices into the jus or over the platter.
If your butcher already cut and tied the bones back on, snip the twine and lift them off.
Leftovers
- Refrigerate within 2 hours, sliced and in shallow containers.
- USDA FSIS: cooked beef keeps 3 to 4 days in the fridge or 2 to 3 months frozen.
- Reheat to 165°F. Thin slices warm quickly in a covered skillet with a splash of the jus, which keeps them from going gray.
For the rest of the week's leftovers, the leftovers guide has the fridge-and-freezer chart for sides and gravy.
Six things for a rib roast
A rib roast needs very little equipment, but the two thermometers are not optional on a cut this expensive. Each pick was checked against its live Amazon page.
-
TempPro TempTrack leave-in probe meat thermometerOur pick
The whole method depends on taking the roast out about 10°F before your target. A probe left in the center with an alarm set to 125–135°F means you never open the oven to check by eye.
- Look for:
- An oven-safe probe on a cable and an adjustable alarm.
- Best for:
- Anyone roasting beef for a crowd while the oven door stays shut.
- Skip:
- if you're comfortable checking every 15 minutes with an instant-read.
-
ThermoWorks Thermapen ONE instant-read thermometer
A second check in a different spot, away from the bone, catches a probe that slid into fat. It's also how you confirm leftovers reach 165°F.
- Look for:
- A thin probe that reads in a few seconds.
- Best for:
- Every rib-roast cook.
- Skip:
- if you already own one that passes the ice-water test.
-
Cuisinart Chef's Classic roasting pan with rack
A bone-in roast stands on its own ribs, so the bones act as the rack. A heavy pan with handles holds the drippings for jus and won't warp in a hot oven.
- Look for:
- A heavy roasting pan with upright handles; a rack helps for boneless roasts.
- Best for:
- Hosts who would otherwise use a flimsy disposable tray for a big roast.
- Skip:
- if you already have a sturdy roasting pan.
-
Regency Wraps cotton butcher's twine
Tying between the ribs keeps the outer cap snug against the eye so it cooks evenly, and a boneless roast needs tying to hold a round shape.
- Look for:
- Plain cotton butcher's twine (not synthetic).
- Best for:
- Anyone whose butcher didn't tie the roast, or who removed the bones to tie back on.
- Skip:
- if the roast comes tied.
-
OXO Good Grips carving and cutting board
A rested roast still releases juice when you slice it. A large board with a groove keeps it off the counter and gives you room to cut the bones away first.
- Look for:
- A large board with a deep juice groove.
- Best for:
- Hosts carving more than a 2-rib roast.
- Skip:
- if you already carve on a big grooved board.
-
Wüsthof Classic 2-piece carving set
Slicing a rib roast is two long cuts: along the curve of the bones, then across the grain. A long carving knife does both in single strokes, and the fork steadies the roast.
- Look for:
- A long, sharp carving knife and a two-tine fork.
- Best for:
- Anyone carving at the table.
- Skip:
- if your chef's knife is long and sharp.
Questions people ask
How long do you cook a standing rib roast?
At 350°F, the beef checkoff's chart gives about 1¾ to 2¼ hours for a 4–6 lb (2-rib) roast to medium-rare, 2¼ to 2½ hours for 6–8 lb (2–4 ribs) and 2½ to 3 hours for 8–10 lb (4–5 ribs). USDA FSIS lists 23 to 25 minutes per pound at 325°F for a 4–6 lb bone-in rib roast. Go by the thermometer, not the clock.
What temperature should I take prime rib out of the oven?
The beef checkoff says remove it at 135°F for medium-rare or 145°F for medium; it rises another 10 to 15°F as it rests 15 to 20 minutes, loosely tented. USDA FSIS's safe minimum for beef roasts is 145°F measured with a food thermometer, followed by a 3-minute rest.
How big a rib roast do I need?
The beef checkoff's rule is one rib for every two people. A 2-rib roast feeds about four, a 4-rib roast about eight. For 12, plan on a full 6-rib roast or two smaller ones.
Is prime rib the same as a standing rib roast?
Usually, in everyday use. Both mean the beef rib roast, cooked standing on its bones. Strictly, Prime is a USDA grade, so a roast labeled prime rib isn't necessarily USDA Prime; the cooking method is the same for any grade.
How long does a frozen rib roast take to thaw?
USDA FSIS says large roasts can take two or more days to thaw in the refrigerator. Raw beef roasts keep 3 to 5 days in the fridge, so buying fresh a few days ahead is often easier.
How long do leftovers keep?
USDA FSIS: cooked beef keeps 3 to 4 days in the refrigerator or 2 to 3 months in the freezer. Refrigerate within 2 hours and reheat leftovers to 165°F.
Sources
Numbers and rules on this page come from these pages, checked November 1, 2026. Sources can change; check them before a high-stakes meal.
- Beef. It's What's For Dinner (beef checkoff): Prime Rib cooking guide (one rib per two people; roast at 350°F; remove at 135°F medium-rare or 145°F medium; rises 10–15°F while resting 15–20 minutes; carving)
- Beef. It's What's For Dinner: Roasting chart (bone-in rib roast at 350°F: 4–6 lb, 6–8 lb and 8–10 lb times to medium-rare and medium)
- USDA FSIS: Beef from Farm to Table (145°F and a 3-minute rest for beef roasts; rib roast 23–25 minutes per pound at 325°F for 4–6 lb bone-in; thawing; storage times)