A chicken and herb casserole is the kind of dish that does not shout about itself. It is not bold or dramatic. It is quiet, fragrant, deeply comforting — the kind of dinner that everyone at the table is glad to see and that disappears without any conversation about it because everyone is too busy eating.

The herbs are the character of this dish. Fresh thyme, rosemary, and tarragon — each added at a different point in the cooking — give the sauce a layered, complex herbal fragrance that is gentle rather than assertive and that suits the cream sauce beautifully.

The tarragon, as in the creamy chicken casserole with white wine, goes in at the very end — its vivid, slightly anise freshness is too delicate to withstand long cooking.

This is a simple casserole with careful seasoning and careful herb timing. Those two things make it considerably better than a casserole that is simply thrown together.

Ingredients for Mary Berry Chicken and Herb Casserole

For the Casserole

8 bone-in skin-on chicken thighs
2 tbsp olive oil
30g unsalted butter
1 large onion, finely chopped
3 garlic cloves, crushed
1 tsp fresh thyme leaves
1 sprig fresh rosemary — added whole, removed before serving
2 tbsp plain flour
200ml dry white wine
400ml good quality chicken stock
150ml double cream
1 tsp Dijon mustard
2 tbsp fresh tarragon leaves, roughly chopped — added at the end only
2 tbsp fresh flat-leaf parsley, chopped — added at the end
Salt and freshly ground white pepper
Juice of ½ lemon — added at the end

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How to Make Mary Berry Chicken and Herb Casserole

Step 1 — Brown the Chicken

Season the chicken thighs very generously. Heat the olive oil in a large, deep casserole over a medium-high heat. Brown skin-side down for five to six minutes until deeply golden and crisp — do not move during browning. Turn and cook two minutes on the other side. Remove and set aside.

Step 2 — Soften the Base

Reduce the heat to medium. Add the butter to the same casserole. Cook the onion for eight minutes until completely soft. Add the garlic, fresh thyme, and the whole rosemary sprig. Cook for two more minutes until fragrant.

Step 3 — Build the Sauce

Sprinkle over the flour. Stir for one to two minutes to cook through. Add the white wine — let it bubble for three minutes, scraping up the base, until reduced by about half. Add the chicken stock. Bring to a simmer and cook for five minutes. Add the cream and mustard. Stir to combine. Season generously with salt and white pepper.

Step 4 — Braise the Chicken

Return the browned chicken thighs skin-side up to the casserole — skin above the sauce level. Cover partially and cook over the lowest possible heat — or in a preheated 160°C / 140°C fan / Gas 3 oven — for 35 to 40 minutes until the chicken is completely tender and cooked through and the sauce is rich.

Step 5 — Finish and Serve

Remove the rosemary sprig. Add the lemon juice, fresh tarragon, and parsley. Stir gently. Taste and adjust seasoning. Serve from the casserole immediately.

My Top Tips For Perfect Chicken and Herb Casserole

Do not move the chicken during the initial browning. Five to six minutes of undisturbed contact with the hot pan gives the deeply golden skin that is one of the pleasures of this dish. Moving it too early tears the skin and gives pale, uneven colour.

The rosemary goes in whole and comes out whole. A whole sprig of rosemary infuses the sauce with its fragrance during braising without giving the slightly harsh, slightly piney note that chopped rosemary can impart when cooked for an extended time. Remove it before serving.

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The tarragon and parsley go in at the very end. Fresh tarragon cooked for forty minutes loses all its character. Added at the end — off the heat or just before serving — it gives a vivid, fresh, slightly anise note that lifts the entire casserole.

Lemon juice at the end is essential. The cream sauce without acidity is slightly heavy and flat. The juice of half a lemon added at the end brightens and focuses everything.

Season more assertively than seems necessary. A cream sauce dilutes the perception of seasoning. Season the sauce until it tastes slightly more assertive than you want the finished dish to be — when the chicken is added and everything comes together, the seasoning will be exactly right.

Serving Suggestions

With creamy mashed potato — the sauce is made to be eaten with mash. With buttered egg noodles. With crusty bread for mopping. With steamed green beans alongside for freshness.

How to Store

In the fridge: Store for up to 3 days. Reheat gently over a low heat — do not boil. Add a splash of stock if the sauce has thickened too much. Add fresh tarragon again when reheating.

In the freezer: Freeze for up to 2 months. Cream sauces can separate slightly on defrosting — reheat gently, stirring well. Add fresh tarragon after reheating.

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Mary Berry Chicken and Herb Casserole Recipe

Mary Berry's chicken and herb casserole is a gently fragrant, golden one-pot with chicken thighs in a herb-scented cream sauce — comforting and elegant.

Print Recipe Pin Recipe

Prep Time 20

Cook Time 1

Total Time 1 20

Servings: 4 Portions

Course: Main Course

Cuisine: British

Calories: 440

Ingredients Method Notes

Ingredients

Chicken and Herb Casserole:
8 bone-in skin-on chicken thighs
2 tbsp olive oil
30 g unsalted butter
1 large onion finely chopped
3 garlic cloves crushed
1 tsp fresh thyme leaves
1 sprig fresh rosemary — whole removed before serving
2 tbsp plain flour
200 ml dry white wine
400 ml good quality chicken stock
150 ml double cream
1 tsp Dijon mustard
2 tbsp fresh tarragon roughly chopped — added at the end only
2 tbsp fresh flat-leaf parsley chopped — added at the end
Salt and white pepper
Juice of ½ lemon — added at the end

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Method

Season chicken generously. Brown skin-side down in hot oil 5–6 minutes without moving — deeply golden. Turn — 2 minutes. Remove.
Add butter to same casserole over medium heat. Cook onion 8 minutes. Add garlic, thyme, and rosemary sprig — 2 minutes.
Add flour — stir 1–2 minutes. Add wine — bubble 3 minutes until reduced by half. Add stock — simmer 5 minutes. Add cream and mustard. Season assertively.
Return chicken skin-side up. Cover partially. Cook over lowest heat or in 160°C oven 35–40 minutes until completely tender.
Remove rosemary. Add lemon juice, tarragon, and parsley. Stir gently. Taste and adjust. Serve immediately from the casserole.

Notes

Do not move chicken during browning — undisturbed contact gives deeply golden skin.

Rosemary goes in whole and comes out whole — infuses without harshness.

Tarragon and parsley at the very end only — fresh herbs lose all character in 40 minutes of braising.

Lemon juice at the end is essential — brightens and focuses the cream sauce.

Season assertively — cream sauce dilutes the perception of seasoning.

Add fresh tarragon again when reheating stored casserole.

Frequently Asked Questions

Can I use chicken breast?

Thighs give a significantly better result in a braised casserole — they stay moist and tender through the full cooking time. If using breast, add it for the final twenty minutes only.

Can I use dried tarragon?

Yes — one teaspoon of dried tarragon added with the thyme at the beginning gives a different but still good result. Dried tarragon lacks the vivid freshness of fresh but gives a pleasant herbaceous background note.