How to Cook Butterflied Leg of Lamb

Butterflied leg of lamb is one of those special cuts that never fails to impress—whether it’s a family barbecue, a Sunday roast, or a festive dinner with friends. We’re big fans of this cut because it’s easy to cook, quick to serve, and absolutely packed with flavour when prepared right.

What Makes Butterflied Leg of Lamb Stand Out?

When a leg of lamb is butterflied, it’s carefully deboned and opened out flat. This gives you a broad, even piece of meat that cooks more quickly and evenly than a traditional bone-in roast.

The extra surface area is perfect for soaking up marinades, and you get a beautiful crust on the outside while keeping the inside juicy and tender.

 

We love it because it’s so versatile—just as comfortable on the grill as it is in the oven, and perfect for both special occasions and easy weeknight meals.

Sourcing Quality Butterflied Leg of Lamb

Quality starts at the source. We believe in using 100% Australian lamb, halal-certified and hormone-free, so you can taste the difference from the very first bite.

We take extra care to trim and butterfly each leg to the ideal thickness, making sure it’s ready for your kitchen—no bones, no fuss, just pure lamb goodness.

How to Cook Butterflied Leg of Lamb

Cooking butterflied leg of lamb is all about letting the natural flavour shine, while adding your own twist with marinades and sides. Here’s how we recommend getting it just right:

Marinate for Maximum Flavour

A butterflied leg of lamb loves a good marinade. With so much exposed surface, every bit of meat can soak up herbs, spices, and aromatics. Our favourite classic marinade includes olive oil, garlic, rosemary, lemon zest, thyme, and a touch of cumin or smoked paprika.

If you have time, let it marinate overnight in the fridge. Even an hour or two will make a big difference.

Choose Your Cooking Method

On the Grill:
Preheat to medium-high. Sear the lamb fat-side down, then flip and finish until you reach your preferred doneness. For medium-rare, aim for about 12–15 minutes per side. A meat thermometer is your best friend here—look for 55–60°C in the thickest part.

 

In the Oven:
Preheat to 200°C (fan-forced). Place the lamb on a rack in a roasting tray, fat side up. Roast for 25–30 minutes for medium-rare. Rest for 10–15 minutes before slicing.

 

On the BBQ:
Set up for two-zone cooking—start with a sear over direct heat, then move to indirect to finish. The gentle heat brings out the best in the lamb, and the smoky aroma is unbeatable.

Rest and Carve

After cooking, rest the lamb under foil for at least 10 minutes. This helps the juices settle, making every slice tender and moist. Always carve against the grain for the best texture.

Butterflied Leg of Lamb Cooking Time and Temperature Guide

Doneness	Internal Temp	Grill/Oven Time (approx.)
Rare	50–54°C	10–12 min/side
Medium-rare	55–59°C	12–15 min/side
Medium	60–65°C	15–18 min/side
Well done	70°C+	18–20 min/side

Flavour Variations and Marinade Ideas

Butterflied leg of lamb is a blank canvas for bold flavours. Here are a few of our favourites:

• Mediterranean: Garlic, rosemary, oregano, lemon, olive oil.
• Middle Eastern: Cumin, coriander, smoked paprika, mint, pomegranate molasses.
• Asian-inspired: Soy, ginger, garlic, sesame oil, and chilli.

Sides That Make the Meal

We always recommend pairing lamb with fresh, vibrant sides. Some of our go-tos:

• Jalapeno slaw (see recipe below)
• Roasted root vegetables
• Greek salad or tabbouleh
• Warm flatbreads or pita
• Herbed yogurt or mint sauce

Recipe: Butterflied Leg of Lamb with Zesty Jalapeno Slaw

This recipe is bright, fresh, and just a little bit spicy.

Ingredients

For the Lamb:

• 1 butterflied leg of lamb
• 4 cloves garlic, minced
• 2 tbsp rosemary, chopped
• 1 tbsp thyme, chopped
• Zest and juice of 1 lemon
• 2 tbsp olive oil
• 1 tsp ground cumin
• 1 tsp smoked paprika
• 1 tsp salt
• ½ tsp black pepper

For the Jalapeno Slaw:

• 1 jalapeno, thinly sliced
• 2 cups coleslaw mix (cabbage, carrot, red cabbage)
• 2 scallions, sliced
• 2 tbsp coriander, chopped

For the Dressing:

• 2 tbsp soy sauce
• 1 tbsp rice wine vinegar
• 1 tbsp sesame oil
• 1 tsp brown sugar
• 1 tsp chilli sauce (optional)

Method

1. Marinate the Lamb: Combine marinade ingredients and rub all over the lamb. Marinate in the fridge for at least 2 hours, or overnight. 
2. Make the Slaw: Toss jalapeno, coleslaw mix, scallions, and coriander. Shake up the dressing and mix with the slaw just before serving. 
3. Cook the Lamb: Grill or roast as above, aiming for medium-rare (55–60°C). Rest before slicing. 
4. Serve: Slice the lamb against the grain, pile onto a platter with slaw, and finish with a squeeze of lemon.

Answers to Common Questions

How do you cook butterflied leg of lamb for the best results?
Marinate well, cook over medium-high heat, and use a thermometer for accuracy. Rest before slicing.

 

What’s the ideal cooking time for butterflied leg of lamb?
About 12–15 minutes per side on the grill or 25–30 minutes in the oven for medium-rare. Check the thickest part for 55–60°C.

 

Can you cook butterflied leg of lamb in the oven?
Absolutely—oven roasting is reliable and gives you a beautiful crust.

 

What’s the best marinade?
We love olive oil, garlic, lemon, and fresh herbs. For something different, try a mint, parsley, and onion paste.

 

What sides go best?
Fresh salads, roasted vegetables, flatbreads, and a tangy yogurt sauce.

 

Butterflied leg of lamb is one of those cuts that makes any meal feel special, without any extra effort. With a good marinade, the right cooking method, and a few fresh sides, you’ll have a feast that brings everyone to the table.

If you’re looking for quality lamb, prepared with care and ready for your kitchen, we’re always happy to help.