Mary Berry Chicken Casserole

This rich, creamy Mary Berry Chicken Casserole is made with tender chicken thighs, crispy smoked bacon, and chestnut mushrooms, all ready in just under 90 minutes. The hero moment happens when you stir in the crème fraîche right at the end, transforming the white wine gravy into a velvety, luxurious sauce. I love how this recipe manages to be elegant enough for a dinner party yet simple enough for a midweek meal.

Why This Classic Works

I have made countless casseroles where the chicken breast dries out before the onions are even soft. What makes this Mary Berry version superior is the use of bone-in chicken thighs; they stay succulent and impart a depth of flavour to the sauce that you simply cannot get from breast meat. The method of adding the mushrooms and crème fraîche halfway through cooking was a revelation to me, ensuring the mushrooms keep their bite rather than turning into a soggy mush.

Another brilliant touch is the balance of dry white wine and chicken stock. Many recipes lean too heavily on one or the other, but this 50/50 split creates a gravy that cuts through the richness of the bacon without being too acidic. It is a foolproof balance that tastes like you have spent hours reducing a stock, even though it comes together relatively quickly in the oven.

Mary Berry Chicken Casserole Ingredients

• 2 tbsp Sunflower oil
• 250g Smoked streaky bacon, snipped into small pieces
• 2 Large onions, chopped
• 8 Skinless chicken thighs (bone-in preferred for flavour)
• 30g Plain flour
• 150ml Hot chicken stock
• 150ml Dry white wine
• 2 Large sprigs of fresh thyme
• 2 Bay leaves
• 200g Small chestnut mushrooms, quartered
• 100g Full-fat crème fraîche
• 1 knob Butter
• Salt and freshly ground black pepper
• Fresh parsley, chopped (for garnish)

How To Make Mary Berry Chicken Casserole

1. Crisp the Bacon: Preheat your oven to 160°C (140°C fan/Gas 3). Heat the sunflower oil in a large flameproof casserole dish or deep ovenproof pan. Add the bacon pieces and fry over medium heat until the fat renders. Add the chopped onions and cook until the bacon is browned at the edges and onions are soft. Remove them with a slotted spoon and set aside on a plate.
2. Brown the Chicken: Season the chicken thighs with salt and pepper. Add them to the residual fat in the pan (add a little more oil if dry) and brown them over high heat, turning once to get a golden colour on both sides. Transfer them to the plate with the bacon.
3. Make the Sauce base: Sprinkle the plain flour into the empty pan and stir well. Gradually pour in the hot chicken stock, stirring constantly to prevent lumps, followed by the white wine. Keep stirring until the liquid thickens slightly.
4. First Bake: Return the bacon, onions, and chicken to the pan. Add the thyme sprigs and bay leaves. Bring the mixture to a boil, cover with a lid, and transfer to the preheated oven for 30 minutes.
5. Add Creaminess: Remove the dish from the oven. Stir in the quartered mushrooms and crème fraîche. Check the seasoning, give it a gentle mix, and return to the oven (uncovered if you want the sauce thicker, or covered for more moisture) for another 15–20 minutes until the chicken is tender and cooked through.

Recipe Tips

• Thicken the sauce: If the sauce is too thin after the final cook, remove the chicken and vegetables with a slotted spoon and boil the liquid on the stovetop for 5 minutes to reduce it.
• Bone-in vs Boneless: Mary Berry recommends bone-in thighs because the bone acts as a heat conductor and keeps the meat moist. If you use boneless thighs, reduce the initial cooking time by 10 minutes.
• Wine substitution: If you prefer not to use alcohol, swap the white wine for an equal amount of extra chicken stock mixed with a teaspoon of lemon juice or cider vinegar to provide the necessary acidity.
• Mushroom timing: Adding mushrooms later in the cooking process is crucial. If added at the start, they release too much water and shrink to nothing; adding them halfway keeps them plump and meaty.

What To Serve With Chicken Casserole

This dish screams for creamy mashed potatoes to soak up that luxurious white wine and crème fraîche sauce. Alternatively, serve it with steamed green beans or tenderstem broccoli to add a fresh, crunchy contrast to the rich, soft textures of the casserole.

How To Store

This casserole tastes even better the next day as the flavours meld. Store leftovers in an airtight container in the fridge for up to 3 days. It freezes beautifully for up to 3 months; just defrost thoroughly in the fridge before reheating gently on the hob until piping hot.

FAQs

Can I use chicken breasts instead?
Yes, but breasts are leaner and can dry out. If using breasts, cut them into large chunks and reduce the total cooking time by about 15 minutes to ensure they stay tender.

Can I make this in a slow cooker?
Absolutely. Brown the meat and veg as per the recipe, then transfer everything (except the mushrooms and crème fraîche) to the slow cooker. Cook on Low for 5-6 hours. Add the mushrooms and cream 30 minutes before serving.

Do I have to use crème fraîche?
Double cream works as a substitute, but crème fraîche adds a lovely tangy note that balances the salty bacon. Sour cream can curdle if boiled, so stick to full-fat options if swapping.

Nutrition

• Calories: 480 kcal
• Total Fat: 28g
• Saturated Fat: 12g
• Cholesterol: 145mg
• Sodium: 620mg
• Total Carbohydrate: 12g
• Protein: 38g