Oven pork ribs are slow-cooked until tender, then coated in a tangy, lightly smoky barbecue-style glaze. This straightforward UK-friendly method uses a covered tray to keep the ribs moist, followed by a short, hotter bake to caramelise the sauce; timings vary a little with rack size and oven type.
Ingredients
- 2 racks pork ribs, about 1.5 kg (3 lb 5 oz) total; spare ribs or baby back ribs both work
- 1 teaspoon fine salt (6 g)
- ½ teaspoon freshly ground black pepper (1 g)
- ½ cup tomato ketchup (120 ml)
- 2 tablespoons soft brown sugar (25 g)
- 1 tablespoon cider vinegar (15 ml)
- 1 tablespoon Worcestershire sauce (15 ml)
- 1 teaspoon smoked paprika (2 g)
- 1 teaspoon mustard powder (2 g)
- ½ teaspoon garlic granules (about 1.5 g)
Instructions
- Heat the oven and prepare the tray. Heat a fan oven to 150°C (300°F), or a conventional oven to 170°C (340°F). Put a rack over a sturdy roasting tray if you have one; otherwise, use the tray by itself. Have enough foil ready to seal the tray tightly. Low, covered cooking gives the ribs time to soften without the sugary glaze burning.
- Prepare the ribs. Pat the racks dry with kitchen paper. If a thin, shiny membrane covers the bone side, loosen a corner with a blunt knife, grip it with kitchen paper and pull it away. Removing it helps seasoning reach the meat and makes the cooked ribs easier to bite, but it is fine to leave it in place if it will not come away cleanly. Season both sides with the salt and pepper.
- Make the glaze. In a small bowl, stir together the ketchup, brown sugar, cider vinegar, Worcestershire sauce, smoked paprika, mustard powder and garlic granules. Set aside about half the mixture for brushing on at the end, and keep it separate from anything that touches raw pork. The vinegar balances the sweetness, while the paprika brings a gentle smoky note.
- Cover and bake. Arrange the ribs meat-side up in the tray. If the racks are too long, cut them in half between the bones so they fit without folding. Spoon or brush the remaining glaze over the top, then seal the tray very tightly with foil. Bake for 2 hours 15 minutes. Avoid opening the foil during this stage: trapped steam helps tenderise the meat and prevents the surface drying out.
- Check tenderness and temperature. Carefully lift one edge of the foil, watching for hot steam. The meat should have pulled back slightly from the ends of the bones and a skewer should slide into the thickest part with little resistance. Check with a food thermometer inserted into the meat without touching bone. USDA FSIS lists 145°F (63°C) with a 3-minute rest as the safe minimum for whole cuts of pork; ribs are generally cooked beyond that point for tenderness, often reaching about 190–203°F (88–95°C). If they still feel firm, reseal the foil and bake for another 15 minutes before checking again.
- Glaze and brown. Once tender, remove the foil and carefully drain away excess liquid if the tray is very wet. Brush the ribs with the clean reserved glaze. Increase the oven to 220°C (425°F) fan or 240°C (465°F) conventional and bake uncovered for 15 minutes, until the glaze looks sticky and lightly browned. Keep an eye on the sugar near the end; it can darken quickly. For stronger colour, use the grill for a minute or two, watching continuously.
- Rest and serve. Transfer the ribs to a clean board and rest for 10 minutes so the juices settle and they are easier to cut. Slice between the bones with a sharp knife and serve with any extra glaze from the bowl, not sauce that has contacted raw pork. The stated timing assumes the ribs are tender after the initial covered bake; if they need extra time, add that to the total.
Tips
- Choose the rack that suits your schedule. Spare ribs are usually meatier and may need a little longer to soften; baby back ribs are often smaller and can become tender sooner. The 2-hour-15-minute covered period is a guide, so check the texture rather than relying on the clock alone.
- Keep the foil sealed. Gaps let steam escape and can leave the meat drier or tougher. If your tray is shallow, make a snug foil parcel around the ribs instead. Use two layers if the foil is thin or has a small tear.
- Do not glaze heavily at the start. A thin layer can flavour the ribs under the foil, but the reserved clean portion goes on at the end. Sugar can scorch during a long roast, so save the sticky coating for the short high-heat finish.
- Adjust the flavour without changing the method. If you do not have cider vinegar, use white wine vinegar or lemon juice in the same amount; either gives a sharper finish. Ordinary paprika can replace smoked paprika, though the ribs will taste less smoky. If Worcestershire sauce is unavailable, use soy sauce for savouriness, noting that it makes the glaze saltier and changes its flavour.
Serving Suggestions
Serve the ribs hot, sliced into individual bones, with a pile of coleslaw and corn on the cob for a familiar barbecue-style plate. For a more substantial meal, add baked potatoes, chips or crusty bread to catch the glaze. A crisp green salad, steamed greens or a vinegar-dressed slaw provides a fresh contrast to the sweet, rich sauce. If serving several people, cut each rack into sections of two or three bones before bringing it to the table; this makes portions easier to handle and leaves room for side dishes.
For a casual gathering, keep extra sauce in a small bowl and let everyone add it to taste. The ribs are also good with pickles or sliced spring onions, which add a sharp, fresh note. If you are serving them alongside other dishes, finish the ribs just before eating so the glaze stays glossy rather than setting into a tacky coating.
Variations
Make the sauce hotter: Add ½ teaspoon (2.5 ml) chilli flakes or a dash of hot sauce to the glaze. Start modestly, especially if serving children or guests who prefer mild food; more heat can be added at the table.
Use a more mustard-forward glaze: Replace the mustard powder with 1 tablespoon (15 ml) Dijon mustard. It gives the coating a slightly sharper, smoother flavour. Because prepared mustard contains moisture, the glaze may be a touch looser, but the cooking method stays the same.
Try a less sweet finish: Reduce the brown sugar to 1 tablespoon (12 g) and increase the cider vinegar to 1½ tablespoons (22 ml). The result is tangier and less sticky, so watch the ribs closely while browning and brush on a thin layer rather than a thick coat.
Use a dry rub instead: For ribs without a tomato glaze, season with the salt, pepper, paprika, mustard powder and garlic granules, then bake covered as directed. Brush lightly with oil before the final uncovered bake if the surface looks dry. This gives a more savoury, less saucy result; the same tenderness and temperature checks still apply.
Storage and Reheating
Refrigerate leftover ribs within 2 hours of cooking. Let them cool briefly, divide them into portions and place them in a covered, airtight container; cooked pork ribs keep for 3–4 days in the refrigerator. Store any reserved, untouched glaze separately. Do not keep ribs at room temperature for longer than 2 hours, and discard leftovers that have been left out beyond that window.
To freeze, wrap cooled ribs securely or pack them in a freezer-safe container, ideally with a little glaze to help protect the surface. For best quality, use within 2–3 months. Thaw overnight in the refrigerator rather than on the worktop. Reheat covered in an oven at 160°C (320°F) until steaming hot throughout; check the thickest section with a thermometer and bring leftovers to 165°F (74°C), the USDA FSIS reheating temperature. Add a spoonful of water or sauce before covering if they seem dry, then uncover briefly at the end if you want to refresh the glaze. You can also reheat single portions in a microwave, turning or rearranging them halfway through and checking for an even, piping-hot centre.
Frequently Asked Questions
How long do pork ribs take in the oven at 150°C fan?
For two racks weighing about 1.5 kg in total, allow around 2 hours 15 minutes covered at 150°C fan, then 15 minutes uncovered at a higher temperature to set the glaze. Plan on about 2 hours 30 minutes of oven time, plus 20 minutes preparation and 10 minutes resting. Larger or meatier racks may need another 15–30 minutes covered, so use tenderness as your guide.
Should I cook ribs covered or uncovered?
Cook them covered for most of the time, then uncover them for the final glaze. The sealed foil traps moisture and steam, helping connective tissue soften; leaving ribs uncovered for the whole cook can dry their surface before they are tender. The hotter uncovered finish browns the glaze without exposing the ribs to a long period of drying heat.
How can I tell when oven ribs are done?
Look for meat that has pulled back a little from the bone ends and feels tender when pierced with a skewer. A thermometer should be placed in the thick meat without touching bone. The USDA FSIS safe minimum for whole pork cuts is 145°F (63°C) followed by a 3-minute rest, but ribs usually need a higher temperature to become tender; temperature and texture together give the most useful check.
Can I cook pork ribs from frozen?
For this method, thaw the racks first in the refrigerator so they cook evenly and you can remove the membrane and season them properly. Cooking from frozen changes the timing substantially and makes it harder to judge tenderness in a covered tray. Keep thawing ribs refrigerated, and cook them promptly once thawed rather than leaving them at room temperature.
Can I prepare the ribs ahead of time?
Yes. You can remove the membrane, season the ribs and mix the glaze up to a day ahead, storing each separately in covered containers in the refrigerator. Cook the ribs on the day you plan to serve them, or cook them fully, chill within 2 hours and reheat later to 165°F (74°C). For the freshest sticky coating, brush on a little reserved glaze during reheating and finish uncovered briefly.
Why are my pork ribs still tough?
They probably need more time at the covered, low temperature. Rack thickness, the amount of meat and differences between ovens all affect how quickly the ribs soften. Reseal the tray and cook in 15-minute increments, checking whether a skewer enters easily; do not try to fix tough ribs by turning up the heat sharply, because that can dry the outside before the connective tissue softens.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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