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Why This Recipe Works
- Hands-off luxury: The slow cooker does 90 % of the work while you entertain.
- Built-in sauce: The long braise creates a glossy, rosemary-perfumed jus—no extra pans required.
- Make-ahead friendly: Flavor improves overnight, so you can cook yesterday and reheat gently.
- Impressive presentation: Nothing says “celebration” like a plate of mahogany lamb shanks.
- Budget-savvy elegance: Lamb shanks are an inexpensive cut that tastes like a million bucks.
- Customizable aromatics: Swap in orange peel, juniper, or even star anise for a personal twist.
Ingredients You'll Need
Quality ingredients make the difference between good and unforgettable. Seek out shanks that are deep rose rather than pale, with a generous fat cap that will baste the meat as it cooks. If your butcher offers “French-trimmed” shanks—where the bone is scraped clean—take them; the presentation is dramatic, and the connective tissue around the bone adds body to the sauce.
- Lamb shanks: 4 whole shanks, about 1¼ lb (570 g) each. Look for cross-cut hind shanks; they’re meatier than foreshanks.
- Garlic: 2 full heads, cloves peeled but left whole. They mellow into buttery pockets of sweetness.
- Fresh rosemary: 4 sturdy sprigs, plus 2 teaspoons minced for finishing. Woody stems go into the pot, then get fished out later.
- Red wine: 2 cups dry, full-bodied. A Côtes du Rhône or Chianti Classico brings berry and herb notes that echo the lamb.
- Pomegranate molasses: 2 tablespoons for subtle tang and lacquer-like shine. In a pinch, reduce ½ cup pomegranate juice with 1 tablespoon honey.
- Crushed tomatoes: 14 oz can, preferably San Marzano. Their natural sweetness balances the wine.
- Chicken stock: 1 cup low-sodium; enough to nearly cover the shanks without drowning them.
- Onion: 1 large yellow, diced small. It melts into the sauce and thickens it naturally.
- Carrot & celery: 1 of each, finely diced—classic mirepoix for depth.
- Anchovy fillets: 2, minced to a paste. You won’t taste fish—only an unidentifiable umami bass note.
- Flour: 2 tablespoons for dredging; promotes browning and helps the sauce cling later.
- Olive oil & butter: 1 tablespoon each for searing. Butter aids browning; oil prevents burning.
- Lemon zest: From ½ organic lemon, added at the end for brightness.
How to Make Slow Cooker Garlic and Rosemary Lamb Shanks for New Year's
Pat, season, and dredge
Rinse shanks under cold water and thoroughly dry with paper towels—moisture is the enemy of a good sear. Season aggressively with 1 tablespoon kosher salt and 2 teaspoons freshly cracked black pepper. Dust lightly with flour, shaking off excess; this forms a micro-crust that will caramelize into fond.
Sear for flavor foundations
Heat olive oil and butter in a heavy skillet over medium-high until the butter foams. Sear two shanks at a time, 3–4 minutes per side, until walnut-brown. Transfer to the slow cooker insert. Deglaze the pan with a splash of wine, scraping up the browned bits, and pour these liquid gold nuggets over the meat.
Build the aromatic base
In the same skillet, reduce heat to medium. Add onion, carrot, and celery with a pinch of salt; sauté until edges turn translucent and lightly golden, about 6 minutes. Stir in anchovy paste; cook 1 minute until it dissolves. Add garlic cloves; cook 2 minutes more. The anchovies will melt, leaving only a whisper of savory depth.
Layer in liquids and herbs
Tip the sautéed vegetables over the lamb. Add rosemary sprigs, crushed tomatoes, pomegranate molasses, remaining wine, and enough stock to come halfway up the sides of the shanks. The meat should not be fully submerged; this encourages steaming while still allowing the tops to caramelize.
Low and slow magic
Cover and cook on LOW for 8 hours or until meat pulls back from the bone by at least 1 inch. Avoid the temptation to peek during the first 6 hours; every lift of the lid drops the temperature and adds roughly 30 minutes to the cook time.
Reduce the sauce
Transfer shanks to a platter and tent loosely. Pour cooking liquid into a fat separator or strain through a sieve into a saucepan. Discard rosemary stems. Simmer over medium heat until reduced by one-third and nappe-consistency (coats the back of a spoon), about 15 minutes.
Brighten and serve
Stir in minced rosemary and lemon zest. Return shanks to the slow cooker on WARM, spoon sauce over top, and let them relax 10 minutes so flavors marry. Serve straight from the crock or transfer to a warmed platter, ladling glossy sauce tableside for maximum drama.
Expert Tips
Overnight flavor boost
Cook the shanks the day before, chill in the cooking liquid, and gently reheat. The collagen sets into a jellied sauce that melts back into unctuous velvet when warmed.
Skim smart
If making ahead, solidified fat lifts off easily with a spoon. Leave a thin layer—some fat equals flavor and mouthfeel.
Use an instant-read
Meat is ready when it reaches 200 °F internally; collagen has melted, but fibers still hold shape.
Double-batch strategy
Two shanks fit in a 6-quart cooker; four require an 8-quart. Overlap bones like puzzle pieces, fat-cap up.
Thickening cheat
For a last-minute gravy fix, whisk 1 teaspoon cornstarch with 1 tablespoon cold water; simmer 2 minutes.
Finishing sparkle
A shower of pomegranate arils just before serving adds jewel-tone crunch and festive tartness.
Variations to Try
- Orange-Olive Mediterranean: Swap pomegranate molasses for 2 tablespoons honey + zest of 1 orange; add ½ cup pitted Kalamata olives during the last hour.
- Smoky Spanish: Replace half the wine with dry sherry and add 1 teaspoon smoked paprika plus a 2-inch strip of orange peel.
- Mint & Red-Currant: Sub fresh mint for rosemary; stir in 3 tablespoons red-currant jelly with the reduced sauce for British pub flair.
- Greek Avgolemono twist: After reducing sauce, whisk 1 egg with 2 tablespoons lemon juice and temper into the hot liquid for silky body.
- Instant Pot shortcut: Sear on SAUTÉ, pressure-cook on HIGH for 45 minutes with natural release 15 minutes, then reduce sauce on SAUTÉ.
Storage Tips
Refrigerate: Cool shanks in sauce within 2 hours. Store in an airtight container up to 4 days. Reheat, covered, in a 300 °F oven for 25 minutes or gently on the stovetop.
Freeze: Freeze portions in heavy-duty bags with all air removed for up to 3 months. Thaw overnight in the refrigerator, then reheat as above.
Make-ahead: The entire dish can be cooked up to 3 days ahead; flavor improves as the sauce permeates the meat. Reheat slowly so fibers don’t seize.
Frequently Asked Questions
Slow Cooker Garlic and Rosemary Lamb Shanks for New Year's
Ingredients
Instructions
- Season & dredge: Pat lamb dry, season with salt and pepper, and dust with flour.
- Sear: Heat oil and butter in skillet; brown shanks 3–4 min per side. Transfer to slow cooker.
- Sauté aromatics: In same skillet cook onion, carrot, celery, anchovy 6 min. Add garlic 2 min.
- Load slow cooker: Add veg, rosemary, wine, tomatoes, stock, pomegranate molasses. Cover.
- Cook: LOW 8 hrs until meat is 200 °F and pulls back from bone.
- Reduce sauce: Strain liquid into saucepan; simmer 15 min until glossy. Stir in minced rosemary & lemon zest.
- Finish: Return shanks to sauce, warm 10 min on WARM. Serve with polenta or crusty bread.
Recipe Notes
Sauce thickens as it sits; thin with a splash of stock when reheating. For party service, hold on WARM up to 2 hours.
