Lamb shoulder is the cut butchers take home. It is cheaper than the leg, it has more flavour, and it is almost impossible to ruin if you give it enough time.
The short answer
Four hours covered at 160C, then 20 to 25 minutes uncovered at 220C, then rest it 20 minutes. It is ready when a fork twists in the meat with no resistance, not when the timer goes off. Bone in for flavour, boned and rolled for neat slices.
On this page
Shoulder versus leg
The leg is the lean, tidy roast. It carves beautifully and it dries out the moment you look away.
The shoulder is a working muscle with fat and connective tissue running through it. You cannot rush a shoulder and you do not need to be precise with it. Those two facts are related.
| Shoulder | Leg | |
|---|---|---|
| Best method | Slow roast, 4 hours plus | Roast, 1 to 2 hours |
| Fat and collagen | High | Low |
| Forgiveness | Very forgiving | Easy to overcook |
| Price per kilo | Lower | Higher |
| Serving | Pulled or spooned | Carved in slices |
| Best for | A long lunch | A timed dinner |
Why low and slow works
Worth understanding, because it explains every instruction below.
The connective tissue running through a shoulder is collagen. Below about 70C it stays tough. Held above that for a few hours it converts into gelatine, which is what makes slow cooked lamb silky rather than stringy.
That is why a shoulder pulled at 60C, which would be a perfect leg, is unpleasant. You are aiming for 90C to 95C internal, well past what any steak chart would call ruined. The fat and the gelatine keep it moist at a temperature that would destroy a lean cut.
It is also why the extra 45 minutes never hurts. Once you are past the conversion point, more time just means more gelatine.
The basic slow roast
Serves 6
- 1 lamb shoulder, bone in, around 2 to 2.5 kg
- 1 whole head of garlic, halved across
- A few sprigs of rosemary
- 2 brown onions, thickly sliced
- 1 cup stock or water
- Olive oil, salt, pepper
- Take the lamb out of the fridge an hour before you start.
- Heat the oven to 160C, or 140C fan.
- Sit the onion slices in a deep roasting tray as a rack. Put the garlic and rosemary among them. The onions stop the base stewing and they turn into the beginning of a gravy.
- Rub the lamb generously with oil, salt and pepper. Sit it on top of the onions, fat side up.
- Pour the stock into the base of the tray, not over the lamb. You want steam underneath, not a wet crust.
- Cover tightly with foil and roast for 4 hours. Tightly matters. A loose seal lets the steam out and the meat dries at the edges.
- Remove the foil, turn the oven up to 220C and give it 20 to 25 minutes to colour.
- Rest for 20 minutes, covered loosely.
It is ready when a fork twists in the meat with no resistance. Do not go by time alone. A larger shoulder simply needs longer, and an extra 45 minutes will not hurt it.
Times and temperatures
| Shoulder weight | Covered at 160C | Uncovered at 220C | Feeds |
|---|---|---|---|
| 1.5 kg | 3 hours | 20 minutes | 4 |
| 2.0 kg | 3 hours 30 | 20 minutes | 5 |
| 2.5 kg | 4 hours | 25 minutes | 6 |
| 3.0 kg | 4 hours 30 | 25 minutes | 8 |
Target internal temperature is 90C to 95C. If you own a probe, use it. If you do not, the fork test is honestly just as reliable on this cut.
Butcher's note
Ask us to score the fat cap before you take it home. Shallow cuts about a centimetre apart let the fat render properly during the covered stage, so the final blast at 220C crisps a rendered surface rather than trying to melt a solid slab in twenty minutes.
Cowra lamb shoulder
Cut to order, bone in or boned and rolled. Tell us how many you are feeding and we will size it.
Order onlineBone in or boned out?
Bone in has more flavour and the bone helps it cook evenly. Best for slow roasting where you are pulling the meat apart anyway. The bone should slide clean out when it is done, which is its own doneness test.
Boned and rolled is easier to carve and easier to portion. Better if you want neat slices or you are stuffing it.
Ask us to bone and roll it if that suits you better. It takes a couple of minutes at the counter and it costs you nothing extra.
Three variations worth trying
Greek. Lemon, oregano and garlic, with potatoes in the tray soaking up the juices. Add the potatoes for the last 90 minutes so they do not collapse.
Slow cooker. Same idea, 8 hours on low. You lose the crust, so finish it under a hot grill for 10 minutes.
Middle Eastern. Cumin, coriander and cinnamon rubbed in the night before, served with flatbread and yoghurt. The overnight rub genuinely makes a difference on a cut this thick.
What goes wrong
Pulled too early. By far the most common. If it resists the fork, it needs another 45 minutes. Trust the fork over the clock.
Foil not sealed. Steam escapes, edges dry out. Crimp it properly around the tray.
Liquid poured over the lamb. It washes the seasoning off and stops the surface browning. Stock goes in the base.
No rest. Twenty minutes. The meat reabsorbs juice that would otherwise end up on the board.
What to serve with it
Something sharp is the important one. Lamb shoulder is rich and fatty by the time it is done, so you want acid on the table: a lemony salad, pickled onions, salsa verde or plain yoghurt with mint.
Then something to catch the juices. Roast potatoes in the same tray, flatbread, or soft polenta. Skip the gravy if you have onions in the base, because the pan juices strained and skimmed are better than anything you can make separately.
Leftovers
Shredded lamb shoulder is better the next day than most roasts are on the night. Use it in wraps with yoghurt and cucumber, fold it through pasta with the pan juices, or pile it on toast with the fat that has set on top of the tray.
It also freezes well once shredded, in its own juices rather than dry. Portion it flat in bags and it thaws in an hour.
Getting a good one
Our Cowra lamb shoulder is cut to order. Tell us how many people you are feeding and whether you want it bone in or rolled, and we will sort it at the counter.
We are at 42 Morts Road, Mortdale, or you can order online for pickup or Sydney delivery.
Questions we get asked
Is shoulder better than leg?
For slow roasting, yes. More fat, more collagen, more forgiving, and cheaper.
How long does it take?
Four hours covered at 160C, then 20 to 25 minutes at 220C, then a 20 minute rest.
What internal temperature?
90C to 95C. Much higher than a steak, and deliberately so.
Bone in or rolled?
Bone in for flavour and pulling. Rolled for neat slices or stuffing.
How much per person?
Around 350g to 400g raw bone in weight per adult.
Can I use a slow cooker?
Yes, 8 hours on low, then finish under a hot grill for the crust.
Cowra lamb, cut to order
Bone in or boned and rolled, scored and sized to your table. Pickup at 42 Morts Road or delivery across Sydney.
Order lamb shoulder