Leg of Lamb "Black and Tan"
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 17 Jan 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
This impressive leg of lamb recipe takes inspiration from the classic 'black and tan' drink, using a combination of stout and lager to create a deeply savoury and complex sauce. By butterflying the lamb and cooking it over indirect heat on the barbecue, you achieve a delicious charred exterior while keeping the meat tender and juicy throughout. The balsamic glaze and lemon pepper seasoning provide a bright, zesty contrast to the rich, malty flavours of the beer-infused gravy.
Ideal for outdoor entertaining or a special Sunday lunch, this dairy-free main course is designed to feed a crowd. The rich sauce can be prepared a day in advance, making the final cooking process much more relaxed. Serve the thinly sliced lamb with roasted root vegetables or a seasonal green salad to complement the robust, earthy flavours of the Guinness and honey mustard reduction.
In this article:
Continue reading below
Ingredients for Leg of Lamb "Black and Tan"
1 2.8kg leg of lamb, boned, butterflied, trimmed of excess fat and sinew (reserve bone and trimmings for sauce)*
1 small onion, chopped
180ml chopped peeled carrots
350ml beef broth
120ml Guinness Extra Stout
120ml Harp lager beer
2 tablespoons honey mustard
Disposable 11 3/4x8 1/2x1 1/4-inch aluminum baking pan
80ml balsamic vinegar
1 tablespoon granulated garlic
3 tablespoons lemon pepper seasoning
2 tablespoons (1/4 stick) chilled butter, cut into 4 cubes
1 teaspoon (or more) honey
How to make Leg of Lamb "Black and Tan"
Preheat oven to 177°C. Arrange lamb bone, trimmings, onion, and carrots in roasting pan. Roast until browned, stirring occasionally, about 1 hour.
Pour off fat and discard lamb bone from roasting pan. Place roasting pan over 2 burners; add broth and bring to boil, scraping up any browned bits. Strain into medium saucepan; discard solids in strainer. Add stout, lager, and mustard; boil until reduced to 180ml , about 5 minutes.
Do ahead: Can be made 1 day ahead. Cover and refrigerate. Rewarm before finishing sauce.
Remove top rack from grill. Place disposable aluminum baking pan in centre of barbecue (if using 2-burner gas grill, place pan on 1 side of grill). Add enough water to pan to reach depth of 1 inch.
Preheat barbecue (medium heat). If using charcoal grill, light briquettes in chimney and place half on each side of aluminum baking pan (you may need to light additional briquettes in chimney to replenish halfway through grilling time). If using 3-burner gas grill, light gas burners on left and right, leaving centre burner off. If using 2-burner gas grill, light burners on side opposite disposable pan.
Place lamb on rimmed baking sheet. Brush lamb all over with balsamic vinegar; sprinkle all over with granulated garlic, then lemon pepper. Place lamb, rounded side up, on grill rack over aluminum pan. Cover grill and cook lamb until instant-read thermometer inserted into thickest part of lamb registers 52°C for medium-rare (temperature of thinner parts of lamb will register between 57°C and 63°C and will vary from medium to well-done), maintaining temperature of barbecue between 177°C and 191°C, 1 to 1 1/2 hours. Transfer lamb to cutting board; let rest 10 minutes.
Bring sauce just to a boil over medium heat. Remove from heat and whisk in butter and honey. Serve with sliced lamb.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
17 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.

Feeling unwell?
Assess your symptoms online for free
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.