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A close-up of rich Creamy Chicken Mushroom Casserole topped with fresh parsley in a white bowl.

Creamy Chicken Mushroom Casserole


  • Author: Emma
  • Total Time: 65 min
  • Yield: 4-6 servings 1x
  • Diet: Vegetarian

Description

A comforting, family-style casserole featuring tender chicken and savory mushrooms in a rich, creamy sauce, perfect for weeknight dinners or feeding a crowd.


Ingredients

Scale
  • 5 chicken breasts (1kg/2.25 lb) chopped into big chunks or strips
  • 45 g (6 tbsp) plain (all-purpose) flour
  • 1/2 tsp salt
  • 1/2 tsp black pepper
  • 2 tbsp oil
  • 2 tbsp unsalted butter
  • 3 small-to-medium onions peeled and finely diced
  • 5 cloves garlic peeled and minced
  • 1 tsp dried thyme
  • 1/2 tsp celery salt optional
  • 25 g (3 tbsp) plain (all-purpose) flour
  • 1 litre (4 1/4 cups) chicken stock
  • 300 ml (1 1/4 cups) milk whole milk or half-fat
  • 2 tbsp freshly squeezed lemon juice
  • 20 chestnut mushrooms thickly sliced
  • 1/2 tsp salt
  • 1/2 tsp pepper
  • 240 ml (1 cup) double (heavy) cream
  • 2 tbsp cornflour mixed with 5 tbsp cold water – to make a slurry
  • small bunch parsley chopped

Instructions

  1. Place the chicken in a bowl with the flour, salt, and pepper. Toss to cover the chicken in the flour and seasoning.
  2. Heat the oil over a high heat in a large frying pan and working in 2 batches, add the chicken. Brown all over. Remove from the pan with a slotted spoon and put to one side.
  3. Place the butter in the same frying pan and melt over a low-medium heat. Add the onions, garlic, thyme, and celery salt and cook for 5 minutes until the onion softens.
  4. Sprinkle on the flour and stir for a minute.
  5. Pour in a splash of the stock and stir, using a whisk until combined. Continue to add in stock, a little at a time, whilst stirring, until all the stock is added and you have a smooth sauce.
  6. Add the milk and continue to stir over the heat until the sauce thickens, then add in the lemon juice.
  7. Add the mushrooms, the cooked chicken, and the salt and pepper. Place a lid on the pan and simmer gently on the hob for 20 minutes. (Alternatively, transfer to a casserole dish, cover with foil, and bake in the oven at 175C/350F (fan) for 30 minutes).
  8. Remove the lid and stir in the cream, then heat through for a further 5 minutes (return to the oven if oven cooking).
  9. If you want the sauce thicker, stir in the cornflour slurry a little splash at a time until you get the thickness you want.
  10. Serve the casserole with mashed potatoes, sprouts, peas, and sweetcorn, and sprinkle with parsley.

Notes

  • You can serve this dish with mashed potatoes, sprouts, peas, and sweetcorn.
  • For a thicker sauce, stir in the cornflour slurry at the end until you reach your desired consistency.
  • Prep Time: 20 min
  • Cook Time: 45 min
  • Category: Dinner
  • Method: Stovetop/Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 550
  • Sugar: 8
  • Sodium: 650
  • Fat: 30
  • Saturated Fat: 15
  • Unsaturated Fat: 10
  • Trans Fat: 1
  • Carbohydrates: 25
  • Fiber: 3
  • Protein: 45
  • Cholesterol: 180

Keywords: Creamy Chicken Mushroom Casserole, Chicken Mushroom Casserole Bake, Chicken Mushroom Cream Sauce Casserole, Easy Chicken Mushroom Casserole, Healthy Casserole Recipes, Chicken Breast Dinner Ideas, Quick Chicken Casserole