How to Cook Ribs in the Oven
Bake pork ribs wrapped in foil at 275°F until tender, finish them with sauce at 400°F, and pull them while the meat still holds to the bone, for baby back, spare, or St. Louis-style racks.
You will end up with a rack of tender pork ribs that pull cleanly from the bone, with a sticky, caramelized outside, made in a regular oven. Season the ribs, wrap them tight in foil, bake them low and slow at 275°F until the collagen melts into gelatin, then finish them uncovered at high heat to caramelize the outside.
The foil holds the moisture in and the oven holds a steady temperature, so there is no fire to tend. Baby back, spare, and St. Louis-style ribs all use the same steps. Only the time in the oven changes, and step 1 helps you choose between them.
A rack of pork ribs (baby back, spare, or St. Louis-style) Aluminum foil (heavy-duty works best) A rimmed baking sheet, to catch any leaks from the foil Paper towels A butter knife or spoon Dry rub ingredients (brown sugar, paprika, garlic powder, onion powder, salt, pepper, cumin, chili powder, cayenne if you want heat) Barbecue sauce (optional) A meat thermometer (optional), for the doneness check in step 6
Choose your ribs
There are three common cuts of pork ribs you will find at the grocery store, and they all work in the oven. They differ in size, meatiness, and cook time. Baby back ribs come from the upper part of the ribcage near the spine. They are shorter, slightly curved, and leaner than other cuts. A rack weighs about 1.5 to 2 pounds and feeds about two people as a main course. They cook faster because there is less connective tissue to break down. Spare ribs come from the lower belly area, below the baby backs. They are longer, flatter, and meatier with more fat running through the meat. A full rack weighs 2.5 to 3.5 pounds. The extra fat and connective tissue mean they need more time in the oven, but they also reward you with richer flavor. St. Louis-style ribs are spare ribs with the cartilage tips and flap trimmed off to create a neat rectangular shape. They cook the same as spare ribs but are easier to cut into individual portions. For your first time, baby backs are a good place to start, because the smaller size means faster feedback on your technique. For maximum flavor, go with spare ribs or St. Louis-style.
Remove the membrane
Flip the rack bone-side up. You will see a thin, translucent membrane stretched across the back of the bones. It is the pleura, the lining of the chest cavity, which some cooks call silver skin. It stays tough through the long cook, so if you leave it on, it keeps the rub off the bone side and leaves the underside of the finished ribs papery and chewy. Slide a butter knife or the handle of a spoon under the membrane at one end of the rack, between the membrane and a bone. Lift and loosen it until you can get a grip with your fingers. Grab the loosened edge with a paper towel for traction, then pull it off in one smooth motion. It should peel away in a single sheet. If it tears, get under the remaining piece and pull again. Some racks from the store come with the membrane already removed. You can tell because the bones will look exposed and slightly moist on the back side rather than covered by a shiny film. If you cannot find the membrane, the butcher has already removed it.
Good to know: Use the paper towel every time. The membrane is slippery and hard to grip with bare fingers, and a dry paper towel gives you the friction to pull it off cleanly.
Apply a dry rub
A dry rub builds a flavorful crust on the outside of the ribs as they cook. The sugar caramelizes, the spices bloom in the heat, and the salt draws moisture to the surface where it mixes with the rub to form a concentrated bark. A solid all-purpose rib rub uses a quarter cup of brown sugar, 2 tablespoons of paprika (smoked if you want a hint of outdoor flavor), 1 tablespoon each of garlic powder, onion powder, and black pepper, 1 tablespoon of kosher salt, 1 teaspoon each of cumin and chili powder, and a half teaspoon of cayenne if you want some heat. Mix everything in a bowl. Pat the ribs dry with paper towels on both sides. You want the surface dry so the rub sticks instead of sliding off in a paste. Sprinkle the rub generously over the entire rack, front and back, pressing it gently into the meat with your hands. That recipe makes about two-thirds of a cup, which is enough for a big rack of spares with a little left over, or for two racks of baby backs. Stop when the surface is coated with no bare spots rather than forcing all of it on. You can apply the rub right before cooking or up to 24 hours ahead. Rubbing the night before and refrigerating uncovered gives the salt time to penetrate deeper and seasons the meat more evenly. If you are short on time, give it at least 30 minutes with the rub on.
Wrap in foil and bake low and slow
Preheat your oven to 275°F (135°C). This is the sweet spot for converting the tough collagen in rib meat into soft, slippery gelatin without drying out the exterior. Higher temperatures cook faster but produce tougher, drier ribs. Lower temperatures work too but add hours. Tear off a sheet of heavy-duty aluminum foil large enough to wrap the entire rack with some room to spare. Place the ribs meat-side down on the foil. Wrap them tightly, sealing all the edges so no steam escapes. The foil traps moisture around the ribs, creating a steamy environment that keeps the meat from drying out during the long cook. This technique is sometimes called the Texas crutch. Place the wrapped rack on a baking sheet (the foil can leak) and slide it into the middle of the oven. Baby back ribs need 2 to 2.5 hours wrapped at 275°F. Spare ribs and St. Louis-style need 2.5 to 3 hours. The extra time accounts for their thicker meat and heavier connective tissue. Do not open the oven to check on them. Every time you open the door, you lose heat and add time. Trust the temperature and the clock.
Good to know: If you want even more moisture, add a few tablespoons of apple juice or apple cider vinegar to the foil packet before sealing it. The liquid creates extra steam and adds a subtle sweetness that complements the pork.
Unwrap, sauce, and finish at high heat
When the time is up, carefully open the foil (steam will escape, so keep your face back) and check the ribs. The meat should have pulled back from the ends of the bones by about a quarter inch, and the surface should look moist and tender. Before you sauce anything, run the bend test or the toothpick test from step 6. If the rack is not tender yet, rewrap it and give it another 15 to 20 minutes at 275°F. Remove the foil entirely and flip the ribs meat-side up on the baking sheet. Now is the moment for barbecue sauce if you want it. Brush a generous layer over the top and sides of the rack. You can use store-bought sauce or make your own. If you prefer dry ribs without sauce, skip the sauce and let the rub be the star. Crank the oven up to 400°F (200°C) and return the ribs uncovered for 8 to 12 minutes. Alternatively, use the broiler on low for 3 to 5 minutes, but watch constantly because the direct heat can burn sugar-based sauces fast. You want the sauce to caramelize and get sticky, with a few dark spots forming at the edges. Check every 2 minutes once the sauce starts to bubble, and pull them out if it starts to blacken or bubble aggressively. This final blast of heat creates the contrast that makes oven ribs satisfying. You get a sticky, slightly charred exterior over meat that pulls cleanly off the bone.
Check for doneness
Temperature alone is not the best indicator for ribs. The USDA puts pork at 145°F (63°C), with at least a 3-minute rest before you eat it. Ribs end up far past that number anyway, for texture rather than safety, since rib meat cooked to only 145°F is tough and chewy. The collagen that makes ribs tough turns into gelatin only with long cooking at temperatures well above that. That slow conversion is why ribs take so long to cook despite being relatively thin. The National Pork Board calls ribs safe at 145°F but best enjoyed at 180°F (82°C). The best test is the bend test. Pick up the rack with tongs at the center. If the ribs bend deeply and the meat starts to crack on the surface where it bends, they are done. If the rack stays stiff and barely flexes, they need more time. You can also use the toothpick test. Slide a toothpick or probe between two bones into the thickest part of the meat. It should slide in with almost no resistance, like poking softened butter. If you feel any tug or resistance, rewrap them and give them another 15 to 20 minutes at 275°F. If you have a meat thermometer, check for the National Pork Board's 180°F in the thickest part of the meat, away from the bone. Then let the bend test decide, because tenderness is what you are cooking for.
Heads up: There is a point past done. If the meat falls completely off the bone at the slightest touch, the ribs are overcooked. Properly cooked ribs should pull cleanly from the bone when you bite into them but not disintegrate on their own.
Rest and serve
Let the ribs rest for 5 to 10 minutes after they come out of the oven. That covers the 3-minute rest the USDA asks for, and the rack is easier to handle and slice once it has cooled slightly. To cut individual ribs, flip the rack bone-side up so you can see where the bones are. Slice between each bone with a sharp knife. The knife should pass through easily since there is mostly just meat and a thin layer of cartilage between the bones. Plan on about half a rack of baby backs per person if ribs are the main dish, or a quarter rack if you are serving them alongside other food. So one rack feeds two as a main course, or up to four as part of a bigger spread. A rack of spare ribs is heavier and goes a little further. Serve with extra sauce on the side for dipping. Classic pairings are coleslaw, cornbread, baked beans, mac and cheese, or a simple green salad to cut through the richness. Have plenty of napkins available.
If the ribs came out tough, they needed more time, so rewrap them and return them to the oven as FAQ 6 below describes. If the meat fell apart on its own, cut the wrapped time by 15 to 20 minutes on the next rack and start the bend test earlier. If the sauce burned, use the 400°F oven instead of the broiler for the finish, and check it every 2 minutes. Once the basic method works, change the rub and sauce rather than the steps. Try a mustard-based Carolina sauce, a vinegar-heavy mop, or skip the sauce and go Texas-style with just salt, pepper, and a long cook. For another hands-off oven method, our guide on how to cook bacon in the oven uses the same rimmed baking sheet.
Questions we get asked about this
Answers from experience, not a textbook.
No. Boiling ribs washes away flavor into the water and can make the exterior mushy while leaving the interior tough. The low-and-slow foil-wrap method breaks down collagen just as well and gets you tender ribs in about 2 to 3 hours without losing any flavor.
Baby back ribs take 2 to 2.5 hours wrapped in foil at 275°F, plus 8 to 12 minutes unwrapped at high heat to finish. Spare ribs and St. Louis-style take 2.5 to 3 hours wrapped, plus the same finishing time. In total, that is about 2 hours 10 minutes for the quickest rack of baby backs up to about 3 hours 15 minutes for thick spare ribs, plus preheating.
You can, but the results will not be as good. At 350°F, the outside of the meat dries out faster than the collagen inside can break down. You end up with ribs that are dry on the edges and potentially still tough in the center. If you must use 350°F for time reasons, keep them wrapped in foil the entire time, start the bend test from step 6 well before the 275°F times, and expect a denser texture.
Meat-side down during the wrapped foil stage. This lets the meat sit in the juices that collect in the foil packet. Meat-side up for the final high-heat stage, so the sauce can caramelize on the presentation side. If you are cooking without foil on a rack, keep them meat-side up the entire time.
Within 2 hours of cooking, wrap leftover ribs tightly in foil or place them in an airtight container. The USDA gives leftovers 3 to 4 days in the refrigerator, or 3 to 4 months in the freezer, and says to reheat them to 165°F. Wrap them in foil with a splash of water or apple juice and bake at 250°F for 20 to 30 minutes, then check that the thickest part has reached 165°F. Keeping them covered, as the USDA advises for reheating leftovers, and adding a little liquid stops them drying out. To use the microwave instead, follow the USDA's method. Put the ribs in a covered microwave-safe dish with a little liquid, vent the cover, rotate the dish partway through, and check for 165°F the same way.
Tough ribs have not cooked long enough. The collagen in rib meat turns into gelatin only with long, sustained heat, so put chewy ribs back in the oven wrapped in foil at 275°F. Check again after 15 to 20 minutes if a toothpick almost slides in, or after 30 to 45 minutes if the rack still feels stiff. Other causes include cooking at too high a temperature (which dries the exterior before the interior breaks down) or not removing the membrane from the back of the rack.