Description

This Chicken Mushroom Pie with a Duchess Potato lid is a savory, comforting dish featuring tender chicken thighs and sautéed mushrooms in a rich Guinness-infused gravy. Topped with piped swirls of creamy duchess potato, finished with melted butter and parmesan, and baked until golden, it’s a perfect hearty meal ideal for cozy dinners.

Ingredients

Scale

Chicken Mushroom Pie Filling

60 g / 4 tbsp unsalted butter (divided into 4 portions)
4 garlic cloves, finely minced
1 1/2 tsp kosher salt, divided
1 tsp black pepper, divided
750 g / 1.5 lb boneless skinless chicken thighs
500 g / 1 lb button mushrooms (small whole, larger ones halved or quartered)
100 g / 3.5 oz thick cut streaky bacon, cut into 2.5 cm / 1″ squares
1 1/2 onions, cut into 2 cm / 1″ wedges
2 sprigs fresh thyme (or 1/2 tsp dried thyme)
1/4 cup plain (all-purpose) flour
3/4 cup Guinness beer
1 1/2 cups low sodium beef stock/broth
3/4 cup water
1 tbsp tomato paste

Duchess Potato Topping

1 kg / 2 lb starchy potatoes, peeled and cut into 2.5 cm / 1″ cubes
30 g / 2 tbsp unsalted butter, cut into 1.5 cm / 1/2″ pieces
1/3 cup hot milk
1/8 tsp white pepper
1/2 tsp kosher salt
30 g / 2 tbsp unsalted butter, melted (or olive oil spray)
2 tbsp grated parmesan cheese
2 tsp finely chopped parsley for garnish (optional)

Instructions

Brown mushrooms: Melt one quarter of the butter in a large 30 cm (12″) non-stick pan over high heat. Add mushrooms and toss for 3-4 minutes to brown the surface. Add another quarter of the butter, toss to coat. Season with 1/4 tsp salt, 1/4 tsp pepper, and half the minced garlic; toss for 30 seconds until garlic is golden. Remove mushrooms to a bowl, scraping out all garlic bits.
Sear chicken: Season chicken thighs with 1/2 tsp salt and 1/4 tsp pepper. In the same pan, melt another quarter of the butter over medium-high heat until foamy. Sear chicken for 2 minutes on each side until golden but still raw inside; do in batches if needed. Remove and, when cool enough, cut into 2.5 cm (1″) pieces.
Cook bacon and onion: Add bacon to the pan and stir for 15 seconds. Add onions and cook for 2 minutes until edges are golden and onions soften. Add remaining garlic and stir for 20 seconds.
Deglaze with Guinness: Pour in Guinness and simmer rapidly, scraping the pan base to loosen browned bits. Reduce liquid by 75%.
Make sauce: Reduce heat to medium and add remaining butter. When melted, sprinkle flour evenly, stirring for 1 minute to make a paste. Gradually add half the beef stock while stirring to avoid lumps. Add remaining stock, water, tomato paste, 1/4 tsp salt, 1/2 tsp pepper, and thyme; stir until smooth.
Simmer mushrooms: Add mushrooms and accumulated juices to the pan. Simmer for 10 minutes until sauce thickens and mushrooms are soft.
Add chicken and thicken sauce: Return chicken and its juices to the pan. Simmer 2-3 minutes until gravy is thick and coats the pan. Adjust salt if needed.
Assemble pie: Pour filling into a 1.5-2 L (6-8 cup) baking dish and smooth the surface evenly.
Preheat oven: Heat oven to 200°C (390°F) or 180°C (fan-forced).
Prepare duchess potato topping: Pipe large swirls of mashed potatoes (approximately 4.5 cm base and 4 cm tall) covering the surface, and fill gaps with smaller swirls/blobs using a piping bag fitted with a star tip. Drizzle melted butter and sprinkle parmesan over the topping.
Bake pie: Bake for 30 minutes, rotating the pan halfway through at 20 minutes until golden and heated through.
Rest and serve: Let the pie rest for 10 minutes after baking. Garnish with chopped parsley if desired and serve.
Make mashed potatoes: Place cubed potatoes in cold water and bring to a boil. Cook 15 minutes or until tender. Drain and mash using a ricer or masher in the pot. Stir in butter, hot milk, salt, and white pepper until creamy but firm enough to hold shape when piped.

Notes

Note 1: Use kosher salt as it has a coarser grain and is preferred for seasoning meat and vegetables evenly.
Note 2: Skinless, boneless thighs ensure tenderness and easy cutting for this recipe.
Note 3: Guinness beer adds deep, robust flavor and richness to the sauce.
Note 4: Starchy potatoes like Russets are ideal for fluffy duchess potatoes that hold their shape when piped.
Note 5: Baking dish size affects filling thickness; a 1.5-2 L pan is recommended for the given quantities.
Note 6: If you don’t have a piping bag, you can use a plastic bag with a corner snipped off or spread the mash evenly with a spatula, then sprinkle with butter and parmesan.

Prep Time: 20 minutes
Cook Time: 60 minutes
Category: Main Course
Method: Baking
Cuisine: British/Irish

Keywords: chicken pie, mushroom pie, duchess potato, Guinness recipe, comfort food, hearty pie