A lamb chump is one of the best lamb steaks on the butcher's board: boneless, thick, and packed with more flavour than a loin chop. It comes from the rump end of the lamb, so treat it like a small rump steak — hot pan, rest, then slice across the grain. This guide covers pan, oven, BBQ and air fryer methods, with a lamb chump cooking times table by doneness and tips so they stay juicy.
What is a lamb chump?
The chump sits where the loin meets the leg. Once the bone is removed you get a neat, oval steak with a fat cap along one edge — not a long-bone chop and not a thin leg steak. Our boneless packs are four chumps of about 325–350g each, enough for four plates or two generous ones. Browse lamb chumps and lamb steaks for the full range, or the wider lamb collection if you are adding chops or a joint for a second meal.
Before you cook lamb chumps
Take the chumps out of the fridge 20 minutes before cooking so the middle is not fridge-cold. Pat them dry with kitchen paper — a wet steak steams instead of browning. Season both sides with salt and pepper just before they go in. If the fat edge is thick, score it lightly every 3–4cm so the steak sits flat. Have a meat thermometer ready: pink lamb is about feel and temperature, not guesswork.
How to cook lamb chumps in a pan
- Heat a heavy frying pan over a medium-high heat with a teaspoon of oil.
- Lay the chumps in, leaving space between them. Cook for 4–5 minutes without moving them, until deep gold underneath.
- Turn and cook for another 4 minutes for a 325–350g chump to medium-pink (58–60°C in the centre).
- For the last minute, add a knob of butter and a sprig of rosemary or thyme and spoon it over.
- Rest on a warm plate for 5–6 minutes, then slice across the grain.
Four chumps will not fit in one domestic pan without steaming — cook two and two, and keep the first pair loosely tented. Crowding drops the heat and you lose the crust. If you wanted a bone-in chop instead, see how to cook lamb chops.
Lamb chump cooking times
These are guide times for boneless chumps of about 325–350g, cooked from fridge-cold after a short rest on the counter. Pans and ovens vary, so go by the thermometer. Rest every chump for 5–6 minutes before slicing.
| Doneness | Centre temp | Pan (medium-high) | Oven after sear 180°C | Air fryer 200°C | BBQ (medium-direct) |
|---|---|---|---|---|---|
| Medium-rare | 57–58°C | 4 min first side, 3–4 min second | 8–10 min | 10–12 min, turn once | 3½–4 min a side |
| Medium-pink (our pick) | 58–60°C | 4–5 min first side, 4 min second | 10–12 min | 12–14 min, turn once | 4–5 min a side |
| Medium | 63–65°C | 5 min a side | 12–14 min | 14–16 min, turn once | 5–6 min a side |
| Well done | 70°C+ | Not ideal — use a slower oven finish | 15–18 min | 16–18 min | Move to cool side after colour |
Slice across the grain the same way you would a beef rump; you will see the fibres running one way. Cut with them and the meat feels chewy. Cut across them and it eats tender.
Oven, BBQ and air fryer
For the oven, sear the chumps in a hot pan for a minute a side, then transfer to a tray at 180°C (160°C fan) for 10–12 minutes for medium-pink. On the BBQ, cook over medium-direct heat for 4–5 minutes a side, watching the fat edge for flare-ups; move to the cool side if they need another minute to hit temperature. In an air fryer at 200°C they take 12–14 minutes, turned once — probe them, because baskets run hot. Chumps are thick enough for an air fryer but not so thick they need a reverse sear unless you enjoy the ritual. For more grill ideas, see our BBQ meat range.
Lamb chump roast with mint
A whole chump roasted and sliced is a proper Sunday plate for one or two. Season well, sear, then roast as in the times table, and finish with mint sauce or a quick pan gravy. Try lamb chump roast with mint for a full recipe. If someone at the table wants mint already on the meat, minted lamb chops sit in the same lamb aisle.
Chumps vs chops vs shoulder
Chumps are a steak: hot and fast, pink in the middle. Loin and Barnsley chops keep the bone, which slows the cook a little and looks smart on the plate — start with lamb chops. Shoulder is a slow-cook cut; do not stew chumps, that is lamb shoulder's job. Chumps give you the flavour of the rump end without paying for bone, but they still need the rest a bone-in chop gets. Skip the rest and you will call them chewy.
Portions, leftovers and freezing
One 325–350g chump is a proper plate, not a nibble. A four-pack is a family grill with potatoes and greens, or two nights for two if you freeze a pair separated by baking paper. Defrost overnight in the fridge. Cold sliced chump is excellent in a salad or flatbread the next day. Keep leftovers covered in the fridge for up to 2 days and reheat gently, or eat them cold.
Lamb chump FAQs
What is a lamb chump?
A lamb chump is a boneless steak from the rump end of the lamb, where the loin meets the leg. It is meatier than a loin chop, with a thick fat edge, and cooks like a small rump steak. Our packs are boneless four-packs of about 325–350g each.
How long do you cook lamb chumps?
A 325–350g boneless chump takes about 4–5 minutes on the first side and 4 minutes on the second in a medium-high pan for medium-pink (58–60°C). In the oven after a sear, allow 10–12 minutes at 180°C. Always rest for 5–6 minutes and slice across the grain.
What temperature should lamb chumps be cooked to?
For a pink centre aim for 58–60°C in the middle, then rest. Medium is around 63–65°C. Unlike chicken, lamb chumps are a steak cut — cooking them to 70°C will dry them out.
Are lamb chumps the same as Barnsley chops?
No. A Barnsley chop is a double loin chop with the bone across the middle. A chump is a boneless rump-end steak. Chumps cook faster and slice cleanly; Barnsley chops need a little more time around the bone.
Can you cook lamb chumps from frozen?
Defrost them overnight in the fridge so they cook evenly. If you must cook from frozen, sear them then finish in a 180°C oven and probe the centre — allow roughly half as long again as the thawed times.
How many lamb chumps per person?
One 325–350g chump is a proper adult plate with potatoes and a vegetable. A four-pack feeds four, or two generous dinners for two if you freeze a pair.
