This is a classic British-style pie made with cooked chicken folded into a creamy white sauce, often with vegetables, and topped with flaky pastry. Mary Berry’s approach focuses on a smooth filling, light seasoning, and a crisp pastry top rather than a heavy base, keeping the pie rich but not overwhelming.
Cooked chicken – 400 g, chopped into bite-sized pieces
Unsalted butter – 40 g
Plain flour – 40 g
Milk – 300 ml
Chicken stock – 150 ml
Onion – 1 medium, finely chopped
Frozen peas or mixed vegetables – 150 g
Fresh parsley – 2 tablespoons, chopped
Salt – to taste
Black pepper – to taste
Ready-rolled puff pastry – 1 sheet
Egg – 1, beaten (for glazing)
Prepare the filling base – Melt the butter in a saucepan over medium heat, add the onion, and cook gently for 5–6 minutes until soft.
Make the roux – Stir in the flour and cook for 1 minute, stirring constantly.
Add liquids gradually – Slowly pour in the milk and stock, whisking until smooth and thickened.
Season and enrich – Add salt, black pepper, and chopped parsley.
Fold in chicken and vegetables – Stir in the cooked chicken and peas, ensuring everything is well coated in the sauce.
Transfer to dish – Spoon the mixture into a pie dish and level the surface.
Top with pastry – Lay the puff pastry over the filling, trim the edges, and crimp lightly.
Glaze and vent – Brush with beaten egg and make a small slit in the centre.
Bake – Bake at 200°C (180°C fan) for 25–30 minutes until golden and bubbling.
Rest briefly – Leave the pie to stand for 5 minutes before serving.
Find it online: https://maryberrycooks.co.uk/mary-berry-leftover-chicken-pie/