Heat butter in a pan and add chopped onion. Cook until soft and slightly golden. This step builds a strong flavor base for your Mary Berry Chicken and Ham Pie Recipe.

Add flour to the pan and stir well. Slowly pour in milk and chicken stock. Keep stirring until the sauce becomes smooth and thick without lumps.

Getting this sauce right is similar to the technique behind a well-seasoned, silky gravy that brings any savory dish together — patience and steady stirring are everything.

Add cooked chicken and ham into the sauce. Stir well so everything mixes evenly. This creates a rich and hearty filling for the pie.

If you enjoy ham in savory baked dishes, you might also love a buttery, egg-based tart that puts ham and cheese center stage — it makes a wonderful weekend brunch alongside this pie.

Add peas, salt, and black pepper. Mix gently and cook for a few minutes. The filling should be creamy and full of flavor.

Pour the filling into a baking dish. Spread it evenly with a spoon. This ensures even cooking and a balanced filling in every bite.

Roll out the puff pastry and place it over the dish. Press edges gently and trim extra pastry. Brush the top with beaten egg for a golden finish.

Preheat oven to 200°C (400°F). Bake the pie for 25–30 minutes. The top should be golden and crispy when ready.

Remove from oven and let it cool for a few minutes. This helps the filling set slightly. Serve warm for the best taste.