Irish Stew NZ: A Hearty, Slow-Simmered Lamb and Potato Stew

Irish stew is a traditional Irish one-pot dish of lamb or mutton, potatoes and onions simmered until tender in a simple broth. This NZ-friendly version uses readily available lamb shoulder, with carrots for a little sweetness and colour; recipes vary by region and household, so the carrots are a practical addition rather than a claim of one definitive version. Serve it hot in deep bowls, with bread to mop up the savoury broth.

Ingredients

2½ lb (1.13 kg) boneless lamb shoulder, trimmed of excess hard fat and cut into 1½-inch (4 cm) pieces; see the tips for a mutton option
1½ tsp (7.5 g) fine salt, divided, plus more to taste
½ tsp (1 g) freshly ground black pepper
2 tbsp (16 g) plain flour, optional, for a slightly thicker broth
1 tbsp (15 ml) neutral oil, such as canola oil
2 medium yellow onions (about 300 g), peeled and cut into thick wedges
2 celery stalks (about 100 g), sliced into ½-inch (1 cm) pieces
5 cups (1.2 L) low-sodium lamb or beef stock
2 bay leaves
1 tsp (1 g) dried thyme, or 3 small fresh thyme sprigs
2 lb (900 g) waxy or all-purpose potatoes, peeled if desired and cut into 1½-inch (4 cm) chunks
3 medium carrots (about 300 g), peeled and cut into 1-inch (2.5 cm) pieces
2 tbsp (8 g) chopped fresh flat-leaf parsley, for finishing

Instructions

Prepare the lamb and vegetables. Pat the lamb dry with paper towels; dry surfaces brown more effectively than damp ones. Season it with about 1 tsp (5 g) of the salt and the pepper. If you want a more substantial broth, toss the lamb with the flour until the pieces have a light, even coating, shaking off any excess. Cut the onions, celery, potatoes and carrots as listed, keeping the potatoes and carrots aside for later.
Brown the lamb in batches. Warm the oil in a large, heavy-based pot or Dutch oven over medium-high heat. Add enough lamb to cover the base without crowding it and brown the pieces for about 2 minutes per side, turning as needed. Transfer each browned batch to a plate and continue; allow about 10 minutes in total. If the pot becomes dry between batches, add a teaspoon of oil rather than forcing the meat to stick.
Soften the aromatics. Reduce the heat to medium. Add the onions and celery to the same pot and cook for about 5 minutes, stirring and scraping up the browned bits. If flour was used, cook the vegetables gently so the flour does not scorch. Return the lamb and any juices on the plate to the pot.
Start the slow simmer. Pour in the stock, then add the bay leaves, thyme and remaining ½ tsp (2.5 g) salt. The stock should mostly cover the lamb; add a little water if needed, but do not dilute it unnecessarily. Bring just to a gentle simmer, then lower the heat, cover with the lid slightly ajar and cook for 1 hour 25 minutes. Keep the liquid at a quiet bubble, not a rolling boil, and stir once or twice so nothing catches on the base.
Add the potatoes and carrots. Stir in the potatoes and carrots, cover the pot again with the lid slightly ajar and simmer for 35 minutes. Stir gently once during this time. The vegetables should become tender but hold their shape; if they are still firm, continue cooking in 5-minute increments. If the stew looks too thick, add a splash of hot water or stock. If it looks thin, leave the lid off for the last few minutes rather than mashing the vegetables.
Check the lamb and finish. Check the thickest lamb pieces with a food thermometer. USDA FSIS lists 145°F (63°C) with a 3-minute rest as the safe minimum for whole cuts of lamb; the long simmer should take the pieces well beyond that temperature and make them tender. Remove the bay leaves, taste the broth and add more salt or pepper if needed. Take the pot off the heat and let the stew rest for 10 minutes, then stir in the parsley and serve.

Tips

Choose a cut suited to a long simmer. Lamb shoulder has connective tissue that softens as it cooks, giving the stew a fuller texture. If mutton is available and you want a more traditional, assertive flavour, use it in the same quantity, but allow extra simmering time if the pieces are not tender after the stated first cooking period. Lean leg meat cooks faster and can turn dry, so it is not the first choice here.
Keep the simmer gentle. A vigorous boil can make lamb tough and break potatoes into fragments. Look for small, occasional bubbles around the edge of the pot. If your stove runs hot even on low, move the pot to a smaller burner or use a heat diffuser.
Cut vegetables to similar sizes. Pieces around 1 to 1½ inches cook at a similar pace. Smaller carrot pieces may become very soft before the potatoes are ready, while oversized potatoes can need longer than the lamb. Waxy potatoes hold their shape particularly well; floury potatoes make a thicker, more rustic broth as they soften.
Season in stages and adjust the broth at the end. Stock varies in saltiness, which is why the recipe starts with a measured amount and finishes with a taste. Avoid adding a large amount of salt early, especially if using regular rather than low-sodium stock. A little extra stock loosens a thick stew; a short uncovered simmer concentrates a thin one.

Serving Suggestions

Serve Irish stew in warmed bowls while the broth is steaming and the lamb is still tender. A slice of crusty bread, soda bread or a simple brown loaf is useful for soaking up the liquid; buttered bread is an easy choice for a relaxed supper. If you would like a green side, offer steamed cabbage, peas or green beans separately so they stay bright rather than cooking down in the pot.

The stew is filling on its own, so keep accompaniments simple. A small bowl of pickled vegetables or a crisp green salad can add a sharp contrast to the soft potatoes and savoury lamb. Scatter each serving with a little extra parsley just before bringing it to the table. If the broth has thickened while standing, stir in a spoonful of hot stock or water before serving.

Variations

Use mutton instead of lamb: Mutton gives the pot a deeper, more pronounced flavour and may need longer to soften. Keep the pieces about the same size, simmer gently, and judge doneness by tenderness rather than relying only on the clock. Traditional Irish stew is commonly associated with mutton, while lamb is a convenient, widely available choice in New Zealand.

Make it without flour: Leave out the optional flour for a lighter, clearer broth. To thicken it naturally, press a few cooked potato pieces against the side of the pot and stir them back in. This makes the liquid more substantial without changing the ingredient list, although the broth will be less silky than one thickened with flour.

Add pearl barley: Stir in ⅓ cup (60 g) rinsed pearl barley when you add the stock, and add 1 cup (240 ml) extra stock or water. Simmer until the barley is tender, checking that the pot still has enough liquid; it absorbs broth as it cooks. This gives the stew a heartier, grain-filled texture and is a variation rather than a required traditional ingredient.

Adjust the vegetables: Parsnips can replace some of the carrots, or you can add about 1 cup (150 g) of sliced leeks with the onions and celery. Both bring their own sweetness and aroma. Keep the total amount of vegetables close to the recipe so the pot does not become crowded and the liquid can circulate.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking, in a covered container. The stew keeps for 3 to 4 days in the refrigerator. For longer storage, freeze it in meal-sized airtight containers for up to 3 months for best quality. Potatoes can soften or become slightly grainy after freezing, but the stew remains suitable to eat when handled and reheated safely.

Reheat only the portion you plan to serve, either in a covered saucepan over medium-low heat or in the microwave, stirring occasionally so it warms evenly. Add a splash of water or stock if the broth has become very thick. Reheat leftovers to 165°F (74°C), checking the centre with a food thermometer, and bring the stew to a steady simmer. Avoid reheating the same batch repeatedly; divide it into smaller portions before storing if you expect to serve it over several meals.

Frequently Asked Questions

Can I make Irish stew in advance?
Yes. The flavour settles as the stew cools, so it can be cooked a day ahead and refrigerated once cooled within 2 hours. Reheat it gently to 165°F (74°C), stirring and adding a little stock or water if needed. The potatoes may be softer the next day, so stir carefully rather than vigorously.

Why is my lamb still tough?
Shoulder needs time at a gentle simmer for its connective tissue to soften. If the lamb is safe to eat but still chewy, keep the pot covered and simmer it for another 15 to 20 minutes before testing again. A hard boil is not a shortcut: it can make the meat firmer while causing the vegetables to break apart.

Can I use lamb chops or ground lamb?
Bone-in lamb chops are awkward for a stew and may leave diners working around bones; boneless shoulder is easier to portion and becomes tender in the cooking time. Ground lamb makes a different dish with a looser, mince-like texture rather than classic chunks of slow-simmered meat. If using ground lamb, brown it thoroughly and follow the USDA FSIS safe minimum of 160°F (71°C) for ground meat.

Do I need to peel the potatoes?
No, as long as they are scrubbed well and their skins are in good condition. Leaving the skins on saves preparation time and gives the stew a more rustic look. Peel them if you prefer a smoother appearance or are using potatoes with thick, damaged or bitter-tasting skins.

What can I use if I do not have lamb stock?
Low-sodium beef stock is a practical substitute and gives the broth a slightly deeper, beefier taste. Vegetable stock works too, though the stew will have less lamb-forward flavour. Choose a stock with moderate salt so you can season the finished broth to taste.

Can I cook this stew in a slow cooker?
Yes, but browning the lamb and softening the onions and celery in a pan first will build flavour. Transfer them with the stock and herbs to the slow cooker and cook on low until the lamb is nearly tender, usually about 6 to 7 hours depending on the appliance. Add the potatoes and carrots for the final 2 to 3 hours, checking them for tenderness; slow cookers vary, so use the food thermometer guidance for the lamb and avoid leaving the vegetables in until they collapse.

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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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