Instant Pot Leg of Lamb with Garlic
Instant Pot Leg of Lamb delivers a tender, sliceable roast fast by combining a bold sear with pressure cooking, then a quick broiler finish for a fragrant crust of garlic and rosemary that feels special but fits a busy day.
If you love lamb but don’t love babysitting the oven for hours, this method is your new go-to. The Instant Pot does the heavy lifting, turning a boneless leg into something juicy and deeply savory in under an hour, start to finish.
The key is treating it like a real roast, not just “pressure-cooked meat.” You’ll season generously, brown every side for that rich exterior, then let the steam work its magic while the lamb stays lifted above the cooking liquid.
And that final broiler moment? It wakes everything up. The rosemary and crushed garlic perfume the surface, and you get that just-roasted look and aroma right before you slice and serve.
Instant Pot Leg of Lamb Ingredients
- Boneless leg of lamb (3 pounds): The main event; choose one that’s evenly shaped for more consistent cooking.
- Olive oil (2 tablespoons): Helps you build a deep sear and adds a Mediterranean-style richness.
- Water (1 cup): Creates the steam needed for pressure cooking without washing off your browned crust.
- Kosher salt: Your best tool for flavor; season all sides so the roast tastes good all the way through.
- Freshly ground black pepper: Adds gentle bite and balances the lamb’s natural richness.
- Garlic cloves (4, crushed): The broiler finish that brings big aroma without overpowering.
- Fresh rosemary (2 tablespoons, chopped): Classic with lamb, especially when it hits the broiler heat.
Cooking Steps
STEP 1: Pat the lamb very dry with paper towels, then season it generously with kosher salt and black pepper on every side. Dry meat browns better, and the seasoning is what makes each slice taste “roast-y,” not bland.
STEP 2: Set your Instant Pot to sauté and heat the olive oil. When it’s hot, sear the lamb on all sides until deeply browned, giving each side a few minutes. Take your time here, because that browned layer is where the flavor lives.
STEP 3: Stop sauté, then place the rack (or trivet) in the pot. Pour in the water carefully so you don’t rinse the browned surface you worked for, and set the lamb on the rack so it stays above the liquid.
STEP 4: Lock the lid and cook on the meat/stew setting (or pressure cook). For a 3-pound boneless leg, aim for about 25–35 minutes, depending on how pink you like it. Thicker roasts need the longer end of the range.
STEP 5: When cooking ends, let the pressure release naturally for 10 minutes, then carefully vent the rest. Natural release helps the lamb stay tender and keeps juices from rushing out as soon as you open the lid.
STEP 6: Check doneness with an instant-read thermometer in the thickest part. If it’s not where you want it, you can return it to pressure briefly, or simply rely on the broiler step plus resting to finish it gently.
STEP 7: Heat the broiler. Remove any netting from the lamb, then press the crushed garlic and chopped rosemary over the top and sides. Transfer the roast to a baking dish and broil about 2 minutes, roughly 6 inches from the heat, watching closely until browned and aromatic.
STEP 8: Rest the lamb for about 10 minutes before slicing. That short rest keeps the slices juicy and makes carving cleaner, especially after pressure cooking.
Helpful Tips
- Don’t rush the sear. A truly browned exterior gives you that roasted flavor even though the pot does most of the cooking.
- Use the rack/trivet every time. Keeping the lamb above the water helps it roast-like rather than boil-like.
- Broil with focus. Two minutes can turn into “too much” fast, so stay nearby and pull it as soon as it smells amazing.
Can I cook it longer for shreddable lamb?
You can, but it will shift the result from sliceable roast to pulled, braise-style lamb. If you want shreddable meat, extend the pressure time and plan to serve it in chunks with the juices, rather than expecting clean slices.
What internal temperature should I aim for?
Use your thermometer as the final word. Many people like lamb around 130–135°F for medium-rare after resting, and closer to 140–145°F for medium to more done. Resting matters, so stop slightly before your ideal final temp.
Why did my lamb turn out a little dry?
Dryness usually comes from cooking past your preferred doneness or skipping the rest. Searing well, using a natural pressure release, and resting before slicing all help protect juiciness. Also, slice across the grain for a more tender bite.
Can I skip the broiler finish?
You can, and the lamb will still be tender and flavorful, but the broiler is what brings back that “just roasted” aroma and browned surface. If you skip it, consider resting a little longer and slicing thinly to keep the texture satisfying.
Serving Ideas for Instant Pot Leg of Lamb
- Roasted potatoes or smashed potatoes: Great for catching any juices on the plate and keeping the meal classic and hearty.
- Lemony couscous or rice: Light, quick, and perfect with the garlic-rosemary finish.
- Simple green veg: Think steamed green beans, sautéed spinach, or a crisp salad to balance the richness of the lamb.
How to Store & Reheat
Let the lamb cool slightly, then refrigerate leftovers in an airtight container. You’ll get the best texture within 3–4 days.
For longer storage, freeze sliced lamb in a freezer-safe container or bag (ideally with a little of its juices) for up to 2–3 months. Thaw overnight in the fridge before reheating.
To reheat without drying it out, warm slices gently in a covered baking dish in a low oven until heated through, or reheat briefly in a skillet with a splash of pan juices or water. If you want the edges crisp again, give it a very quick pass under the broiler right at the end.
Instant Pot Leg of Lamb
Ingredients
- 1 cup water
- 2 tablespoons olive oil
- 3- pound boneless leg of lamb
- Kosher salt as needed for seasoning
- Freshly ground black pepper to taste
- 4 garlic cloves crushed
- 2 tablespoons chopped fresh rosemary
Instructions
- Pat the boneless leg of lamb dry thoroughly with paper towels. Season it generously on every side with kosher salt and freshly ground black pepper.
- Select the sauté function on the Instant Pot and pour in the olive oil. When the oil is heated, add the lamb carefully and sear it on all sides until well browned, allowing a few minutes per side.
- Place the rack in the bottom of the Instant Pot so the roast does not rest directly in the liquid. Pour the water into the bottom of the pot, taking care not to pour it over the meat. Set the browned lamb on the rack.
- Secure the lid and cook using the meat/stew setting for 25 to 35 minutes, depending on the desired doneness. For reference, a 4-pound leg of lamb generally requires about 30 minutes for medium-rare.
- Once the cooking cycle is complete, allow the pressure to release naturally for 10 minutes. After that, carefully release any remaining pressure. Check the internal temperature with an instant-read thermometer. If further cooking is needed, return the lamb to the pot briefly or finish it in the oven.
- Preheat the broiler. Remove any netting from the lamb, then spread the crushed garlic and chopped rosemary over the top and sides.
- Transfer the lamb to a baking dish and place it under the broiler, positioning it about 6 inches from the heat. Broil for about 2 minutes, or until the surface is nicely browned and aromatic.
- Remove the lamb from the oven and let it rest for 10 minutes before slicing. Serve warm with your preferred side dishes.