Lamb Shepherd’s Pie with Red Wine Gravy and Rosemary Mash

On a chilly evening, this lamb shepherds pie with red wine gravy is the kind of dinner that can anchor the whole table: savory ground lamb beneath a thick blanket of rosemary mashed potatoes, with crisp golden peaks at the edges. A splash of dry red wine deepens the filling without making it taste boozy, and carrots, celery, and peas give the rich gravy a little sweetness and texture.

This is a full meal in one baking dish, but each part can be made ahead. The filling simmers while the potatoes cook, then a hot oven brings everything together. Give the casserole a short rest before serving so each scoop holds its layers instead of sliding onto the plate.

Why You’ll Love This Lamb Shepherds Pie with Red Wine Gravy

• Deep, savory filling: Browning the lamb and vegetables before adding wine and stock builds flavor in the same pan.
• Fluffy rosemary mash: Yukon Gold potatoes turn creamy with butter and milk, while fresh rosemary gives the topping a fragrant finish.
• A true one-dish dinner: The lamb, vegetables, and potato topping make six generous servings, with no separate side required.
• Easy to prepare ahead: Make the filling and mash earlier in the day, then assemble and bake before dinner. For a meatless variation, try this vegetarian lentil and sweet potato pie.

Ingredients and Notes

This recipe serves 6. A 9-by-13-inch baking dish works well, though a similarly sized 3-quart casserole is fine. If your lamb is especially lean, add another teaspoon of oil before cooking the vegetables.

For the lamb filling

• 1 tablespoon olive oil
• 2 pounds ground lamb
• 1 medium yellow onion, finely diced
• 2 medium carrots, peeled and diced small
• 2 celery ribs, diced small
• 3 garlic cloves, minced
• 2 tablespoons tomato paste
• 2 tablespoons all-purpose flour
• 1/2 cup dry red wine, such as Cabernet Sauvignon or Merlot
• 1 1/2 cups beef or chicken broth, preferably low sodium
• 1 tablespoon Worcestershire sauce
• 1 teaspoon chopped fresh thyme, or 1/2 teaspoon dried
• 1 teaspoon chopped fresh rosemary, plus 1 tablespoon for the potatoes
• 1 cup frozen peas, thawed; 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper

For the rosemary potato topping

• 2 1/2 pounds Yukon Gold potatoes, peeled and cut into 1 1/2-inch chunks
• 4 tablespoons unsalted butter
• 1/2 cup warm whole milk, plus more as needed
• 1/4 cup sour cream
• 1 large egg yolk, optional, for a richer, more golden top
• 1 tablespoon finely chopped fresh rosemary, 3/4 teaspoon kosher salt, and black pepper to taste

How to Make It

1. Heat the oven and cook the potatoes. Set a rack in the center of the oven and heat it to 400°F. Put the potato chunks in a large pot, cover with cold water by an inch, and stir in a generous pinch of salt. Bring to a boil, then simmer for 15 to 18 minutes, until a fork slides into the centers easily.
2. Brown the lamb. While the potatoes cook, heat the olive oil in a wide skillet or Dutch oven over medium-high heat. Add the ground lamb and break it into small pieces. Cook for 7 to 9 minutes, stirring occasionally, until browned and no longer pink. If a large amount of fat collects, spoon off all but about 1 tablespoon.
3. Soften the vegetables. Add the onion, carrots, and celery to the lamb. Cook for 5 to 6 minutes, stirring, until the onion turns translucent and the carrots begin to soften. Add the garlic and tomato paste; stir for 1 minute so the paste darkens slightly and coats the meat.
4. Build the red wine gravy. Sprinkle the flour over the filling and stir for 1 minute. Pour in the wine, scraping the browned bits from the bottom of the pan. Let it simmer for 2 to 3 minutes, then stir in the broth, Worcestershire, thyme, 1 teaspoon rosemary, salt, and pepper. Simmer gently for 8 to 10 minutes, until glossy and thick enough to coat a spoon. Stir in the peas, then taste and adjust the seasoning. Ground lamb should reach 160°F for food safety; check with a food thermometer and see the USDA’s guidance for lamb.
5. Mash the potatoes. Drain the potatoes well and return them to the hot pot for 1 minute so steam can escape. Mash with the butter, warm milk, sour cream, chopped rosemary, salt, and several grinds of pepper. Stir in the egg yolk if using. The mash should be soft enough to spread but not runny; add milk a tablespoon at a time if needed.
6. Assemble the casserole. Spoon the lamb mixture into the baking dish and spread it in an even layer. Dollop the potatoes over the top, then gently spread them to the edges so they seal the filling. Drag a fork over the surface to make ridges that will turn crisp and golden.
7. Bake until bubbling. Set the dish on a rimmed baking sheet in case the gravy bubbles over. Bake uncovered for 25 to 30 minutes, until the edges are bubbling and the potato peaks are lightly browned. For a deeper top, broil for 1 to 2 minutes at the end, watching closely.
8. Rest and serve. Let the pie stand for 10 to 15 minutes before scooping. This brief rest lets the gravy settle and keeps the layers together. Serve with a simple green salad or steamed green beans.

If you enjoy lamb dinners with plenty of herbs, this slow-cooked lamb supper is another cozy option. For a special occasion, see the rosemary garlic leg of lamb. A bowl of hearty beef chili is a good alternative when you want a similarly filling dinner without assembling a casserole.

Tips and Variations

For a little extra depth, this lamb shepherds pie with red wine gravy takes well to a teaspoon of finely chopped fresh parsley stirred into the filling just before baking. Keep the herbs measured so they support the lamb rather than compete with it.

• Choose the wine you like to drink. A dry, medium-bodied red adds depth. Avoid sweet wine; it can make the filling taste syrupy. If you prefer to cook without wine, use extra broth and add 1 teaspoon balsamic vinegar for a little acidity.
• Keep the gravy thick. It should look slightly looser than a stew before baking because it will continue to bubble beneath the potatoes. If it seems thin, simmer it a few minutes longer before assembling.
• Make the top extra crisp. Brush the potato surface with a little melted butter before baking, then broil briefly after the center is hot.
• Swap the herbs. Use parsley and thyme instead of rosemary for a gentler flavor. A small pinch of smoked paprika in the filling is also good with lamb.
• Use beef if needed. Ground beef makes a tasty cottage pie. The red wine gravy and rosemary mash work the same way, so the method does not need to change.

Storage and Reheating

Cool leftovers within 2 hours, cover the dish, and refrigerate for up to 4 days. Reheat individual portions in the microwave until steaming, or warm a larger amount covered with foil in a 350°F oven for 20 to 25 minutes. Remove the foil for the last 5 minutes to refresh the potato top. If the filling looks dry, spoon a tablespoon of broth around the edge before reheating.

To freeze, assemble the casserole in a freezer-safe dish but do not bake it. Wrap tightly and freeze for up to 2 months. Thaw overnight in the refrigerator, then bake at 400°F until hot throughout and bubbling, usually 35 to 45 minutes. You can also freeze baked portions; thaw them in the refrigerator and reheat covered in the oven.

Frequently Asked Questions

What is the difference between shepherd’s pie and cottage pie?

Shepherd’s pie is traditionally made with lamb, while cottage pie uses beef. The two dishes share the same comforting structure of savory filling under mashed potatoes.

Can I make the filling a day ahead?

Yes. Cook the filling, cool it, and refrigerate it in a covered container for up to 24 hours. Make the potatoes on the day you bake, or prepare them ahead and stir in a splash of warm milk before spreading.

What can I use instead of red wine?

Replace the wine with an equal amount of broth and add 1 teaspoon balsamic vinegar or a squeeze of lemon to brighten the gravy. The taste will be a little lighter but still savory.

Can I assemble lamb shepherds pie with red wine gravy in advance?

Yes. Assemble the cooled filling and potatoes in the dish, cover, and refrigerate for up to a day. Bake straight from the refrigerator, adding about 10 minutes to the baking time, until the center is hot and the edges bubble.