Leftover Turkey Shepherd’s Pie with Mashed Potato Topping

The filling should bubble at the edges before the topping turns fully golden, and that little window is what makes this pie feel like more than leftovers. I like how…

By Riley • October 25, 2026 • Reading time: 9 min

Save Recipe Print Recipe

Tip: save now, cook later.

The filling should bubble at the edges before the topping turns fully golden, and that little window is what makes this pie feel like more than leftovers. I like how the turkey settles into a savory gravy with soft carrots and sweet peas, while a thick layer of mashed potatoes keeps every serving hearty. A 9×13-inch dish gives the filling and topping room to bake together without crowding.

For this leftover turkey shepherd’s pie, I thicken the broth with flour before folding in the cooked turkey. That gives the filling enough body to stay beneath the potatoes instead of making them sink into a thin sauce. Russet potatoes make a fluffy topping that spreads easily to the edges, where it picks up a little color as the filling bubbles below.

Why the Flour Goes Into the Vegetables Before the Broth

A turkey pie can look finished on top and still spoon out watery underneath. The fix happens before the broth goes into the skillet: the flour gets stirred through the softened onion and carrots and cooked for a minute. That coats the vegetables and gives the flour a moment to cook, so it thickens the broth without leaving a raw, pasty taste.

Adding the broth gradually helps the flour disperse instead of clumping. Once the sauce has simmered until thickened, the turkey goes in. Because the turkey is already cooked, it doesn’t need a long simmer in the skillet; it will warm through in the oven as the filling bubbles. The finished filling should be saucy enough to hold together, not so loose that it runs when you serve a slice.

That order also keeps the potato layer distinct from the savory filling. Spread the mash all the way to the edges of the dish, and it forms a cap over the filling rather than disappearing into it. When the edges bubble and the topping has turned lightly golden, the layers are ready to rest and settle before serving.

What Russet Potatoes and the Turkey Filling Each Bring to the Pie

• Cooked leftover turkey — Chopping it into bite-size pieces makes it easier to serve and gives each portion a mix of turkey and gravy. White or dark meat both work; use the turkey you have, with the understanding that lean breast meat tends to seem a little less moist after baking.
• Russet potatoes — Their starchy texture mashes into a fluffy topping that spreads over the filling without feeling heavy. Yukon Gold potatoes can stand in if needed, though the topping will be denser and less fluffy.
• All-purpose flour and low-sodium chicken broth — Together they make a savory sauce that clings to the turkey and vegetables. Low-sodium broth gives you more control over the salt, and cooking the flour briefly before adding liquid helps avoid a raw flour taste.
• Frozen peas and carrots — The carrots soften with the onion, while the peas add a little sweetness and a tender pop in the filling. Frozen peas go straight into the skillet; there’s no need to thaw them first.
• Butter and whole milk — These make the mashed potato topping rich and smooth. Unsalted butter lets the measured salt do its job without adding an extra unknown, while whole milk loosens the mash without making it watery.
• Garlic, thyme, and Worcestershire sauce — These season the filling with savory depth. Dried thyme is handy here because it can simmer right in the broth, and Worcestershire brings a rounded, savory note without requiring a separate sauce base.

Build the Gravy First, Then Cap It With Mash

Soften the vegetables without browning them

Heat the oven to 400°F and coat a 9×13-inch baking dish with nonstick cooking spray. Warm the olive oil in a 12-inch skillet over medium heat, then cook the diced onion and carrots for 6 to 8 minutes, until softened. Stir in the garlic and cook for 30 seconds. If the garlic starts to brown, lower the heat; it should smell fragrant, not toasted.

Thicken the broth before adding the turkey

Stir the flour into the softened vegetables and cook it for 1 minute. Gradually stir in the chicken broth, Worcestershire sauce, dried thyme, 1/2 teaspoon of the salt, and the pepper. Simmer for 3 to 4 minutes, stirring, until the sauce thickens; keep stirring around the bottom and corners of the skillet so it doesn’t catch. Stir in the peas and chopped turkey, then transfer the filling to the prepared baking dish.

Mash the potatoes while the filling waits

Put the peeled, 1-inch potato chunks in a 6-quart pot and cover them with cold water by 1 inch. Bring the water to a boil and cook for 15 to 20 minutes, until a fork slides easily into the potatoes. Drain them and return them to the pot, then add the butter, milk, and remaining salt. Mash until smooth; stop once the lumps are gone rather than working the potatoes longer than needed.

Seal the edges and bake until the center is hot

Spread the mashed potatoes evenly over the turkey filling, bringing the topping right to the edges of the dish. That edge-to-edge layer keeps the filling tucked underneath as it bubbles. Bake for 25 to 30 minutes, until the topping is lightly golden and the filling bubbles around the edges; check that the center of the filling reaches 165°F. Let the pie rest for 10 minutes before serving so the filling settles and portions hold their shape.

Two Practical Changes for a Different Topping or Filling

Questions That Come Up With Leftover Turkey Shepherd’s Pie

Leftover Turkey Shepherd's Pie with Mashed Potato Topping

Leftover turkey shepherd's pie layers savory turkey, vegetables, and gravy beneath a smooth mashed potato topping. Bake it until lightly golden and bubbling around the edges for a comforting dinner that puts cooked turkey to use.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 1 hour hr

resting time 10 minutes mins

Total Time 1 hour hr 30 minutes mins

Servings: 8 servings

Course: Dinner

Cuisine: American

Calories: 400

Ingredients Equipment Method Notes

Ingredients

  

For the filling

• 1 cooking spray nonstick
• 2 tbsp olive oil
• 1 yellow onion medium, diced
• 2 carrots medium, diced
• 2 cloves garlic minced
• 2 tbsp all-purpose flour
• 1.5 cup chicken broth low-sodium
• 1 tbsp Worcestershire sauce
• 1 tsp dried thyme
• 1.5 tsp kosher salt divided
• 0.5 tsp ground black pepper
• 1 cup peas frozen
• 4 cup turkey cooked leftover, chopped

For the mashed potato topping

• 3 lb russet potatoes peeled and cut into 1-inch chunks
• 6 tbsp unsalted butter
• 0.75 cup whole milk

Equipment

• 1 9x13-inch baking dish
• 1 12-inch skillet

Method

 

Make the filling

1. Heat the oven to 400°F.
2. Coat a 9x13-inch baking dish with nonstick cooking spray.
3. Heat the olive oil in a 12-inch skillet over medium heat.
4. Add the onion and carrots and cook for 6 to 8 minutes, until softened.
5. Stir in the garlic and cook for 30 seconds.
6. Stir in the flour and cook for 1 minute.
7. Gradually stir in the broth, Worcestershire sauce, thyme, 1/2 teaspoon of the salt, and the pepper.
8. Simmer for 3 to 4 minutes, stirring, until thickened.
9. Stir in the peas and turkey.
10. Transfer the filling to the prepared baking dish.

Make the topping

1. Put the potatoes in a 6-quart pot and cover with cold water by 1 inch.
2. Bring to a boil and cook for 15 to 20 minutes, until a fork slides easily into the potatoes.
3. Drain the potatoes and return them to the pot.
4. Add the butter, milk, and remaining 1 teaspoon salt.
5. Mash until smooth.

Assemble and bake

1. Spread the mashed potatoes evenly over the filling, bringing them to the edges of the dish.
2. Bake for 25 to 30 minutes, until the topping is lightly golden and the filling bubbles around the edges; check that the center of the filling reaches 165°F.
3. Let the pie rest for 10 minutes before serving.

Notes

For a smooth topping, mash the potatoes while hot. Refrigerate leftovers for 3 to 4 days; freezer-friendly. For a dairy-free swap, use plant-based butter and unsweetened plant milk.