Anna Louise Chicken and leek casserole is the most gentle and comforting of all the chicken casserole recipes on this site. Where the Spanish chicken is bold and smoky and the chicken chasseur is richly French.
This is quiet and completely soothing — tender chicken, silky leeks, a cream sauce seasoned with thyme and a little mustard, and nothing that fights for attention. It is the kind of dinner that makes everyone at the table relax.
Mary Berry’s chicken and leek casserole builds the sauce around the leeks — properly softened until completely tender and sweet — with a veloute base enriched with cream and finished with fresh thyme and a little Dijon. The chicken is browned first for colour and flavour, then braised in the sauce until falling-tender.
This is the casserole for a cold evening, for cooking for someone who needs gentle feeding, and for any occasion when you want something that is simultaneously easy to make and genuinely wonderful to eat.
Why the Leeks Must Be Properly Cooked
The leek is the defining ingredient of this casserole in the same way it is in the chicken and leek pie. Undercooked leeks taste slightly harsh and have a raw edge that undermines the gentle character of the dish.
Properly cooked leeks — twelve minutes over a medium-low heat until completely soft, slightly collapsed, and beginning to turn sweet — give the casserole its silky, gentle quality.
Do not rush the leeks. Twelve minutes is the minimum. The patience is the difference between a good chicken casserole and a genuinely exceptional one.
Ingredients for Mary Berry Chicken and Leek Casserole
- 8 bone-in skin-on chicken thighs
- 4 large leeks, washed and sliced into 2cm rounds
- 2 tbsp olive oil
- 40g unsalted butter
- 1 large onion, finely chopped
- 3 garlic cloves, crushed
- 2 tbsp plain flour
- 150ml dry white wine
- 400ml good quality chicken stock
- 200ml double cream
- 2 tsp fresh thyme leaves
- 1 tsp Dijon mustard
- 2 bay leaves
- 2 tbsp fresh flat-leaf parsley, chopped
- Salt and freshly ground black pepper
How to Make Mary Berry Chicken and Leek Casserole — Step by Step
Step 1 — Brown the Chicken
Season the chicken generously. Heat the olive oil in a large, deep casserole or ovenproof pan over a medium-high heat. Place skin-side down and cook for four to five minutes until the skin is deeply golden and crisp. Turn and cook two minutes on the other side. Remove and set aside.
Step 2 — Soften the Onion and Leeks
Reduce the heat to medium. Add the butter to the same pan. Cook the onion for five minutes until beginning to soften. Add the sliced leeks and cook over a medium-low heat for twelve minutes, stirring occasionally, until completely soft, slightly collapsed, and beginning to turn sweet. Add the garlic and thyme and cook for one more minute.
Step 3 — Build the Sauce
Sprinkle the flour over the leeks and onion. Stir for one to two minutes to cook through. Add the white wine — let it bubble briefly, scraping the base. Add the chicken stock, cream, mustard, and bay leaves. Season generously. Stir to combine.
Step 4 — Braise
Return the browned chicken pieces skin-side up to the casserole, nestling them into the leek sauce. The skin must sit above the sauce.
Bring to a gentle simmer. Cover partially and cook on a low heat — or in a preheated 160°C / 140°C fan / Gas 3 oven — for 35 to 40 minutes until the chicken is completely cooked through and the sauce is rich and slightly thickened.
Step 5 — Finish and Serve
Remove the bay leaves. Taste and season generously. Scatter with fresh parsley. Serve from the casserole.
My Top Tips For Best Mary Berry Chicken and Leek Casserole
Cook the leeks for twelve minutes. This instruction appears in the chicken and leek pie recipe too because it is equally important here. Twelve minutes minimum. The leeks should be completely soft, slightly collapsed, and sweet. Undercooked leeks give a harsh, raw note to the entire casserole.
Keep chicken skin above the sauce. The golden skin developed during browning is one of the pleasures of this dish. Keep it above the sauce throughout braising to preserve its colour and texture.
Use white wine for the sauce. The gentle character of this casserole is served by white wine rather than red. Red wine would give too robust and too dark a character for what is a pale, creamy, gentle dish.
Do not boil the cream. Once the cream is in, keep the casserole at a gentle simmer rather than a vigorous boil. Vigorous boiling can cause the cream to split and the sauce to become slightly grainy.
Make it the night before. Like all casseroles, this one improves overnight. The leeks meld into the sauce, the chicken absorbs the cream and thyme, and the whole dish becomes more unified and more deeply flavoured than on the day it is made.
Serving Suggestions
With creamy mashed potato — the sauce soaks into the mash magnificently. With steamed green beans or peas alongside. With crusty bread for mopping. With rice for a lighter alternative to potato.
How to Store Mary Berry Chicken and Leek Casserole
In the fridge: Store in an airtight container for up to 3 days. Reheat gently on the hob — do not boil. The flavour improves overnight.
In the freezer: Freeze in portions for up to 3 months. The cream sauce can separate slightly on defrosting — reheat gently, stirring well, and it usually comes back together.
Frequently Asked Questions
Can I use chicken breast?
Thighs give a significantly better result in a braised casserole — they stay moist and tender through forty minutes of gentle cooking. Breast can become dry and stringy. If using breast, add it for the final twenty minutes only.
Can I add mushrooms?
Yes — 200g of sliced chestnut mushrooms cooked until golden and added with the chicken give a wonderful earthy note alongside the leeks. See the chicken and leek pie recipe for a version with mushrooms.
Can I make this dairy-free?
Replace the butter with olive oil and the double cream with full-fat oat cream or coconut cream. The result is slightly different in character but still very good.
Can I use leeks from frozen?
Frozen leeks are much higher in moisture than fresh and will make the sauce watery. Use fresh leeks only for this recipe.
Can I add a mustard and herb crust on top and bake uncovered for the last fifteen minutes?
Yes — a mixture of breadcrumbs, butter, Parmesan, and fresh thyme scattered over the casserole and baked uncovered at 190°C for fifteen minutes gives a golden, slightly crunchy top that is absolutely wonderful.
also for Mary Berry Chicken and Leek Casserole Recipe
Ingredients
Method
- Season chicken. Brown skin-side down in hot oil 4–5 minutes until deeply golden. Turn — 2 minutes. Remove.
- Reduce heat. Add butter. Cook onion 5 minutes. Add leeks — cook over medium-low heat 12 minutes until completely soft and sweet. Add garlic and thyme — 1 minute.
- Sprinkle over flour — stir 1–2 minutes. Add wine — bubble briefly, scrape base. Add stock, cream, mustard, and bay leaves. Season generously. Stir.
- Return chicken skin-side up. Bring to a gentle simmer. Cover partially. Cook on low heat or in 160°C oven 35–40 minutes until cooked through and sauce is rich.
- Remove bay leaves. Season. Scatter parsley. Serve from the casserole.
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