Chicken and Leek Pie: A Simple, Creamy Recipe

Chicken and leek pie is a comforting British-style bake with tender chicken, sweet softened leeks and a creamy sauce beneath crisp pastry. This straightforward version uses cooked chicken and ready-rolled puff pastry, making it practical for a weeknight while still feeling special.

Ingredients

1 sheet ready-rolled puff pastry, about 10 oz (280 g), thawed if frozen
1 lb 5 oz boneless, skinless chicken thighs, cut into ¾-inch (2 cm) pieces (600 g)
2 medium leeks, white and light-green parts only, about 12 oz (340 g)
2 tablespoons unsalted butter (28 g)
1 tablespoon olive oil (15 ml)
3 tablespoons all-purpose flour (24 g)
1½ cups low-sodium chicken broth (360 ml)
½ cup whole milk (120 ml)
½ teaspoon dried thyme (about 0.5 g), or 1 teaspoon fresh thyme leaves
½ teaspoon fine salt (3 g), plus more to taste
¼ teaspoon black pepper (about 0.5 g)
1 tablespoon Dijon mustard (15 g), optional
1 large egg, beaten with 1 teaspoon water (15 ml), for the pastry wash

Instructions

Heat the oven to 400°F (200°C). Set a rack in the middle. Rinse the leeks carefully, separating the layers to remove grit, then slice them into thin half-moons. Pat the chicken dry and season it with the salt and pepper.
Warm the oil in a large skillet over medium-high heat. Add the chicken in a single layer, working in batches if needed, and cook for 5–7 minutes, turning occasionally, until browned and cooked through. Check the thickest pieces with a food thermometer: the USDA FSIS safe minimum for poultry is 165°F (74°C). Transfer the chicken to a clean plate. It will finish warming in the pie, but must be safely cooked before it goes into the filling.
Reduce the heat to medium and add the butter and sliced leeks. Cook for 6–8 minutes, stirring often, until soft but not deeply browned. If the pan looks dry, add a tablespoon of water rather than letting the leeks catch.
Sprinkle the flour over the leeks and stir for 1 minute to coat them. Gradually pour in the broth, stirring to smooth out lumps, then add the milk, thyme and mustard if using. Bring to a gentle simmer and cook for 3–4 minutes, stirring, until the sauce thickens enough to coat a spoon.
Return the cooked chicken and any plate juices to the pan. Stir to combine, taste, and adjust the seasoning. Remove the pan from the heat and let the filling cool for 10 minutes; this brief pause helps keep the pastry from softening before it goes into the oven.
Spoon the filling into a 9-inch (23 cm) pie dish. Lay the pastry over the top, trimming any excess to leave about a ½-inch (1 cm) overhang. Press the pastry edges against the rim of the dish to seal, then cut a small slit in the center for steam. Brush the top with beaten egg, taking care not to let it run down the sides, which can hinder the rise.
Bake for 25–30 minutes, until the pastry is puffed and deep golden and the filling bubbles through the vent. If the pastry browns too quickly, loosely cover it with foil for the final few minutes. Rest the pie for 10 minutes before serving so the sauce settles and portions are easier to lift.

Tips

Clean leeks thoroughly: Soil often hides between the layers. Slice them first, then swish the pieces in a bowl of cold water and lift them out, leaving grit behind.
Keep the filling thick: If it seems runny, simmer it for another minute or two before adding the chicken. A watery filling can make the pastry soggy.
Use cold pastry: Keep it refrigerated until the filling is ready. If it becomes warm and floppy, chill it briefly before topping the pie.
Choose a shortcut safely: You can use about 3 cups (400 g) chopped leftover cooked chicken instead of raw thighs. Stir it into the finished sauce and heat until steaming; the assembled pie must still be piping hot throughout.

Serving Suggestions

Serve the pie warm with green vegetables such as peas, green beans or broccoli, plus a simple salad for freshness. For a heartier plate, add mashed potatoes or boiled new potatoes, though the pastry and creamy filling already make it substantial. A spoonful of mustard on the side works well if you skipped it in the sauce.

Variations

Swap the chicken thighs for an equal weight of boneless chicken breast, taking care not to overcook it while browning. For a deeper, earthier filling, add 1 cup (100 g) sliced mushrooms with the leeks and cook until their liquid evaporates. A handful of frozen peas can be stirred in with the chicken. For a lighter finish, replace the puff pastry lid with shortcrust pastry, following its package guidance for baking; the texture will be more tender and less flaky. If using fresh herbs, parsley or tarragon can replace thyme, with tarragon giving the filling a more pronounced anise-like note.

Storage and Reheating

Refrigerate leftover pie within 2 hours of baking, covered or in an airtight container, and use within 3–4 days. Reheat portions in a 350°F (175°C) oven until hot throughout; check the center reaches 165°F (74°C), the USDA FSIS temperature for reheated leftovers. A microwave also works, though the pastry will soften. For freezing, wrap fully cooled portions airtight and freeze for up to 2 months for best quality. Thaw in the refrigerator overnight and reheat to 165°F (74°C); avoid repeatedly cooling and reheating the pie.

Frequently Asked Questions

Can I make chicken and leek pie ahead?
Yes. Prepare the filling up to 1 day ahead, cool it promptly, and refrigerate it. When ready to bake, assemble the pie with cold pastry and allow a few extra minutes in the oven if the filling is very cold. Do not leave cooked filling at room temperature for more than 2 hours.

Can I use cooked rotisserie chicken?
Yes. Remove the meat from the bones and use about 3 cups (400 g), chopped or shredded. Add it after the sauce thickens so it does not dry out, then bake until the filling is thoroughly hot.

Why is my pie filling runny?
It may not have simmered long enough after the flour and liquids were combined, or the leeks may have released extra moisture. Simmer the sauce until it coats a spoon before assembling, and let the filling cool briefly to thicken further.

Can I assemble the pie and bake it later?
It is better to refrigerate the filling separately and add the pastry shortly before baking. If you assemble it in advance, keep it covered in the refrigerator and bake within 24 hours; pastry may lose some lift as it sits against the filling.

Can I use shortcrust instead of puff pastry?
Yes. Shortcrust makes a firmer, less flaky lid. Use a sheet or a homemade round sized for your dish, cut a steam vent, and follow the pastry package directions while checking that the filling is bubbling hot.

Do I need to cook the chicken before baking?
Yes in this recipe. Brown it until a thermometer confirms 165°F (74°C) before it goes into the filling. This ensures poultry reaches the USDA FSIS safe minimum; do not rely on pastry color or appearance alone to judge chicken doneness.

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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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