Shepherd’s pie is a British and Irish-style casserole of seasoned ground lamb, vegetables, and gravy beneath a golden mashed-potato topping. This version gives you the same clear sequence a cooking video would show: make the filling, prepare fluffy potatoes, assemble, and bake until bubbling.

Ingredients

2 lb (900 g) russet or Yukon Gold potatoes, peeled and cut into 1½-inch (4 cm) chunks
4 tbsp (57 g) unsalted butter, divided
½ cup (120 ml) whole milk, warmed, plus more as needed
1 tsp (5 g) kosher salt for the potatoes, plus more to taste
½ tsp freshly ground black pepper, divided, plus more to taste
1 tbsp (15 ml) olive oil
1 medium yellow onion, finely diced, about 1 cup (150 g)
2 medium carrots, peeled and diced, about 1 cup (130 g)
1 lb (450 g) ground lamb
2 tbsp (30 g) tomato paste
2 tbsp (16 g) all-purpose flour
1 cup (240 ml) low-sodium beef or lamb broth
1 tbsp (15 ml) Worcestershire sauce
1 tsp (1 g) chopped fresh rosemary, or ½ tsp dried
1 tsp (1 g) chopped fresh thyme, or ½ tsp dried
1 cup (150 g) frozen peas, no need to thaw
½ cup (50 g) finely grated sharp cheddar, optional

Instructions

Heat the oven and start the potatoes. Set a rack in the center and heat the oven to 400°F (200°C). Put the potatoes in a large saucepan and cover with cold water by about 1 inch (2.5 cm). Add a generous pinch of salt. Bring to a boil, then lower the heat and simmer for 15–20 minutes, until a knife slides easily into the largest pieces.
Cook the vegetables and lamb. While the potatoes cook, heat the oil in a large oven-safe skillet or sauté pan over medium heat. Add the onion and carrots and cook for 5–7 minutes, stirring now and then, until softened. Add the ground lamb and break it into small pieces. Cook for 7–9 minutes, stirring and crumbling it, until browned throughout. Check the thickest pieces with a food thermometer: USDA FSIS sets 160°F (71°C) as the safe minimum internal temperature for ground lamb.
Make the gravy. Spoon off excess fat if the pan contains more than about 1 tablespoon. Stir in the tomato paste and flour and cook for 1 minute. Slowly pour in the broth, stirring to dissolve the flour, then add Worcestershire sauce, rosemary, thyme, and ¼ teaspoon pepper. Simmer for 4–6 minutes, stirring, until the gravy is thick enough to coat the meat. Stir in the peas, taste, and adjust the salt and pepper. If your skillet is not oven-safe, transfer the filling to a 2-quart (1.9 L) baking dish.
Mash the potatoes. Drain the cooked potatoes well and return them to the hot pan for about 1 minute to let excess moisture evaporate. Mash until smooth. Mix in 3 tablespoons (43 g) butter, the warm milk, 1 teaspoon salt, and the remaining ¼ teaspoon pepper. Add a splash more milk if needed; the potatoes should spread easily but remain thick. Avoid beating them for a long time, which can make them gluey.
Assemble the pie. Spoon the potatoes over the lamb filling and spread them to the edges to seal in the gravy. Drag a fork across the top to make ridges that will brown. Dot with the remaining 1 tablespoon (14 g) butter and scatter over the cheddar if using.
Bake and rest. Set the skillet or baking dish on a rimmed sheet pan in case it bubbles over. Bake for 20–25 minutes, until the filling is bubbling at the edges and the top is lightly golden. For deeper color, broil for 1–2 minutes, watching closely. Rest for 10 minutes before serving so the gravy settles and the portions hold together.

Tips

Keep the layers distinct: Drain potatoes thoroughly, and simmer the filling until its gravy is thick. Watery potatoes or loose gravy can make the finished pie runny.
Use lamb for shepherd’s pie: Ground beef is a practical substitute, but the dish is then commonly called cottage pie. The method and quantities stay the same.
Make the top easy to spread: Let the filling cool for 5–10 minutes before adding the potatoes, especially if it is very hot. Spread the mash gently so it does not sink into the gravy.
Choose a baking dish that fits: A 2-quart (1.9 L) dish gives the filling and topping room without making the layers too thin. A metal or ceramic dish may brown at a slightly different rate, so watch the edges.

Serving Suggestions

Serve the pie hot with a simple green salad, steamed green beans, or buttered cabbage to balance its rich meat and potato layers. A side of roasted carrots or a spoonful of pickled red cabbage also works well. Since the filling already contains peas and carrots, extra vegetables are optional rather than necessary. For a larger meal, offer crusty bread to mop up any gravy.

Variations

For a more traditional, straightforward topping, leave out the cheddar; it is an optional addition, not essential to the dish. Replace the peas with an equal amount of frozen corn or use a mixed frozen vegetable blend. For extra depth, stir ½ cup (120 ml) dry red wine into the browned meat before the broth and simmer until reduced by about half; then add the broth as written. If using beef instead of lamb, keep the seasoning and cooking steps the same. These are flexible family-style variations, not a claim that there is only one definitive version.

Storage and Reheating

Refrigerate leftovers within 2 hours of cooking, in a shallow covered container or tightly covered baking dish. They keep for 3–4 days in the refrigerator. Reheat individual portions in the microwave, or warm a covered baking dish in a 350°F (175°C) oven until hot throughout. Check the center with a food thermometer; USDA FSIS recommends reheating leftovers to 165°F (74°C). Uncover for the last few minutes if you want to restore some color to the potato topping. For longer storage, freeze well-wrapped portions for up to 2–3 months for best quality, then thaw in the refrigerator before reheating. Do not leave the pie at room temperature for more than 2 hours.

Frequently Asked Questions

Can I make shepherd’s pie ahead?
Yes. Prepare the filling and mashed potatoes, assemble the pie, cover, and refrigerate for up to 24 hours before baking. Because it will start cold, allow extra oven time and confirm that the center is piping hot; cover loosely with foil if the top browns before the filling heats through.

Can I use leftover mashed potatoes?
Yes. Use about 4 cups (900 g) of prepared mashed potatoes. If they are very stiff, stir in a little warm milk so they spread without pulling the filling into the topping. Seasoned potatoes may need less added salt.

Why is my shepherd’s pie watery?
The filling may not have simmered long enough to thicken, or the potatoes may have retained too much water. Simmer the gravy until it coats a spoon, and let drained potatoes steam dry briefly in the hot pan before mashing. Resting the baked pie for 10 minutes also helps it set.

Can I assemble it in a cast-iron skillet?
Yes, provided the skillet is oven-safe and large enough for the filling and potato layer. A hot skillet can brown the bottom more quickly, so place it on a rimmed sheet pan and begin checking for bubbling and browning at 20 minutes.

Do I need to thaw the peas first?
No. Stir them in frozen; they will heat through in the gravy and oven. Thawing is fine too, but drain them if they release excess water.

Is shepherd’s pie gluten-free?
Not as written, because the flour thickens the gravy and Worcestershire sauce can contain gluten depending on the product. Use a certified gluten-free Worcestershire sauce and replace the flour with 1 tablespoon (8 g) cornstarch mixed with 2 tablespoons (30 ml) cold water. Stir the slurry into the simmering broth and cook until thickened.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).

Shepherd’s Pie Video: A Classic Lamb Recipe