Chicken and Leek Pie Recipe: Creamy British Classic

Chicken and leek pie is a British-style savoury pie filled with tender chicken in a creamy leek and mustard sauce, topped with crisp puff pastry. This version uses cooked chicken to keep the filling straightforward, and lets it cool before baking so the pastry rises rather than turning soggy.

Ingredients

1 sheet ready-rolled puff pastry, about 10 oz (280 g), thawed if frozen
1 1/2 lb cooked skinless chicken, cut into bite-size pieces (680 g; about 4 cups)
2 medium leeks, trimmed, washed carefully and sliced, about 12 oz (340 g)
3 tbsp unsalted butter (42 g)
1 tbsp olive oil (15 ml)
1/3 cup all-purpose flour (45 g)
1 1/2 cups chicken stock (355 ml), preferably lower-sodium
3/4 cup whole milk (180 ml)
1/2 cup heavy cream (120 ml)
1 tsp Dijon mustard (5 g)
1 tsp fresh thyme leaves, or 1/2 tsp dried thyme (about 1 g)
1/2 tsp fine salt (3 g), plus more to taste
1/4 tsp ground black pepper (about 0.5 g)
1 large egg, beaten with 1 tsp water (15 ml), for glazing

Instructions

Prepare the oven and dish. Heat the oven to 400°F (200°C), or 375°F (190°C) for a fan oven. Set a rack in the centre. Use a 9-inch (23 cm) deep pie dish, approximately 1 1/2 quarts (1.4 litres). Put the cooked chicken in a large bowl.
Soften the leeks. Melt the butter with the olive oil in a large saucepan over medium-low heat. Add the sliced leeks and cook for 8–10 minutes, stirring often, until soft but not browned. If the pan looks dry, lower the heat; browned leeks can make the sauce taste bitter.
Make the sauce. Sprinkle the flour over the leeks and stir for 1 minute. Gradually pour in the stock, stirring or whisking to prevent lumps, then add the milk and cream. Stir in the mustard, thyme, salt and pepper. Bring to a gentle simmer and cook for 3–5 minutes, stirring, until thick enough to coat a spoon. Taste and adjust the seasoning.
Combine and cool the filling. Pour the sauce over the chicken and stir to coat. Spoon the filling into the pie dish and spread it evenly. Leave it to cool for about 15 minutes, until no longer steaming. Cooling helps keep the pastry crisp; don’t leave cooked chicken or filling at room temperature for more than 2 hours.
Top the pie. Lay the pastry over the dish. Trim excess pastry, leaving about 1/2 inch (1 cm) overhang, then press it onto the rim to seal. Cut a small cross or a few short slits in the centre so steam can escape. Brush the top with beaten egg and water. Put the dish on a baking sheet in case the filling bubbles over.
Bake and check. Bake for 30–35 minutes, until the pastry is puffed and deep golden and the filling is bubbling at the edges. Because this recipe uses cooked chicken, the pie is being heated rather than cooking raw poultry; if using any freshly cooked chicken in the filling, verify that it reached the USDA FSIS safe minimum internal temperature of 165°F (74°C) with a food thermometer before mixing it in. Let the pie stand for 10 minutes before serving so the sauce settles.

Tips

Wash leeks thoroughly: grit often hides between their layers. Slice them first, then swish in a bowl of cold water and lift them out, leaving the grit behind.
Use cold pastry and cooled filling. Keep puff pastry chilled until you’re ready to top the pie, and avoid covering hot filling; warmth melts pastry fat before it can puff.
Choose cooked chicken that is not too dry. Leftover roast chicken or plainly poached chicken works well. Remove skin and bones, and cut the meat into similar-sized pieces for even portions.
Adjust a sauce that seems loose before baking. Simmer it a little longer, stirring, until it coats a spoon. A thin sauce may remain runny beneath the pastry, especially if the filling is still hot.

Serving Suggestions

Serve the pie hot after its 10-minute rest, with a green vegetable such as peas, green beans or cabbage. For a more substantial plate, add mashed potatoes or boiled new potatoes, though the pastry already makes the meal filling. A lightly dressed green salad is a useful contrast to the creamy sauce. Spoon portions carefully: the filling will be hot, and the pie may be softer than a fully cooled slice.

Variations

Make it without cream: replace the cream with the same amount of milk. The sauce will be less rich; simmer it until thick before adding the chicken.
Add mushrooms: cook 6 oz (170 g) sliced mushrooms with the leeks, allowing their released moisture to evaporate before adding the flour.
Use shortcrust pastry: replace the puff pastry with about 10 oz (280 g) ready-rolled shortcrust. It gives a firmer, less flaky lid; follow the package guidance if its baking temperature differs.
Add herbs or vegetables: stir in 1/2 cup (75 g) cooked peas, or use parsley in place of thyme. Keep extra vegetables cooked and drained so they do not water down the filling.

Storage and Reheating

Refrigerate leftovers within 2 hours of baking, covered or in an airtight container. They keep for 3–4 days in the refrigerator. For the best pastry, reheat portions in an oven at 350°F (175°C) until piping hot throughout; use a food thermometer to confirm leftovers reach 165°F (74°C), the USDA FSIS reheating temperature. A microwave also works, though it softens the pastry; cover loosely and heat in short intervals, checking the centre. Freeze cooled portions in airtight, freezer-safe packaging for up to 2 months for best quality. Thaw in the refrigerator before reheating, and reheat only the portion you plan to eat.

Frequently Asked Questions

Can I make chicken and leek pie ahead?
Yes. Prepare the filling and refrigerate it in a covered container for up to 1 day. Cool it promptly and keep it chilled. Add the pastry shortly before baking; if the filling is cold, allow a few extra minutes in the oven and check that it is piping hot throughout.

Can I use raw chicken?
Cook the chicken separately before adding it to the sauce. This recipe’s timing and filling method are designed for cooked chicken, not raw pieces beneath the pastry. Use a food thermometer to verify poultry reaches 165°F (74°C), the USDA FSIS safe minimum internal temperature.

Why is my pie filling runny?
The sauce may not have simmered long enough, or the filling may have been very hot when covered. Thicken the sauce on the stovetop until it coats a spoon, and let the assembled filling cool before topping it. Also drain cooked vegetables well before adding them.

Can I freeze the whole pie?
It’s usually easier to freeze baked portions, as puff pastry can lose some of its crispness after thawing. Cool the pie, wrap portions well and freeze for up to 2 months for best quality. Thaw in the refrigerator and reheat to 165°F (74°C).

What can I use instead of puff pastry?
Ready-rolled shortcrust pastry is a straightforward alternative and makes a sturdier lid. You can also bake the filling in individual ovenproof dishes and top each with pastry, adjusting the baking time until the pastry is golden and the filling is hot.

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

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