Quick Recipe Version (TL;DR)
Quick Ingredients
- 700 g boneless, skinless chicken thighs (about 1 1/2 lb), cut into bite-size pieces
- 300 g cremini mushrooms (about 10–12 oz), sliced
- 2 medium shallots, finely chopped
- 2 garlic cloves, minced
- 45 g unsalted butter (3 tbsp)
- 1 tbsp olive oil
- 35 g all-purpose flour (about 1/4 cup)
- 120 ml dry white wine (1/2 cup), optional (or extra stock)
- 300 ml chicken stock (1 1/4 cups)
- 150 ml heavy cream (2/3 cup)
- 2 tsp Dijon mustard
- 2 tbsp fresh tarragon, chopped (or 2 tsp dried)
- 1 tsp kosher salt, plus more to taste
- 1/2 tsp black pepper, plus more to taste
- 1 sheet all-butter puff pastry, 320 g (about 11–12 oz), thawed if frozen
- 1 large egg + 1 tbsp water (egg wash)
Do This
- 1. Heat oven to 200°C (400°F). Set a 9-inch (23 cm) pie dish on a baking sheet.
- 2. Brown chicken in butter + oil; remove. Sauté shallots, mushrooms, and garlic until deeply browned.
- 3. Stir in flour; cook 1 minute. Add wine (optional), then stock; simmer until thick.
- 4. Stir in cream, Dijon, and tarragon; add chicken back and simmer 3–5 minutes. Cool 15 minutes.
- 5. Spoon filling into dish. Top with puff pastry, crimp edges, cut 2–3 vents, brush with egg wash.
- 6. Bake 30–35 minutes until deeply golden and bubbling. Rest 10 minutes before slicing.
Why You’ll Love This Recipe
- Classic bistro comfort: tender chicken and earthy mushrooms in a creamy tarragon sauce.
- A flaky puff pastry lid gives you maximum crunch with minimal fuss.
- The filling is made on the stovetop, so you know it’s perfectly seasoned and thick before baking.
- Make-ahead friendly for stress-free entertaining or cozy weeknight leftovers.
Grocery List
- Produce: cremini mushrooms, shallots, garlic, fresh tarragon (or dried)
- Meat: boneless, skinless chicken thighs
- Dairy: unsalted butter, heavy cream, 1 large egg
- Pantry: olive oil, all-purpose flour, chicken stock, Dijon mustard, puff pastry, kosher salt, black pepper, dry white wine (optional)
Full Ingredients
For the Chicken & Mushroom Filling
- Chicken: 700 g boneless, skinless chicken thighs (about 1 1/2 lb), cut into 2.5 cm / 1-inch pieces
- Mushrooms: 300 g cremini mushrooms (10–12 oz), sliced 6 mm / 1/4-inch thick
- Aromatics: 2 medium shallots (about 80 g total), finely chopped; 2 garlic cloves, minced
- Fat: 45 g unsalted butter (3 tbsp); 1 tbsp olive oil
- Thickener: 35 g all-purpose flour (about 1/4 cup), spooned and leveled
- Liquid: 120 ml dry white wine (1/2 cup), optional; 300 ml chicken stock (1 1/4 cups), plus up to 60 ml (1/4 cup) as needed
- Creaminess: 150 ml heavy cream (2/3 cup)
- Flavor: 2 tsp Dijon mustard
- Herbs: 2 tbsp fresh tarragon, chopped (or 2 tsp dried tarragon)
- Seasoning: 1 tsp kosher salt (plus more to taste); 1/2 tsp black pepper (plus more to taste)
For the Pastry Lid
- 1 sheet all-butter puff pastry, about 320 g (11–12 oz), thawed if frozen
- 1 tbsp all-purpose flour, for dusting
For the Egg Wash
- 1 large egg
- 1 tbsp water
- Pinch of salt (optional, helps the wash brush smoothly)
Helpful Equipment
- 9-inch (23 cm) pie dish or shallow baking dish (about 2-quart / 2-liter capacity)
- Large skillet or sauté pan
- Baking sheet (to catch drips)
Step-by-Step Instructions
Step 1: Prep, preheat, and set up
Position a rack in the middle of the oven and preheat to 200°C (400°F).
Place a 9-inch (23 cm) pie dish on a rimmed baking sheet (this prevents spills from burning on your oven floor).
Cut the chicken into bite-size pieces, slice the mushrooms, and chop the shallots. If your puff pastry is frozen, make sure it’s thawed according to the package directions (it should be cold but pliable).
Step 2: Brown the chicken
In a large skillet over medium-high heat, melt 30 g (2 tbsp) of the butter with 1 tbsp olive oil.
Add the chicken in an even layer. Sprinkle with about 1/2 tsp of the salt and some of the pepper. Cook for 4–6 minutes, stirring occasionally, until the chicken is lightly browned on the outside (it does not need to be cooked through yet).
Transfer the chicken to a plate and set aside.
Step 3: Sauté mushrooms and aromatics until deeply flavorful
Reduce heat to medium. Add the remaining 15 g (1 tbsp) butter to the pan.
Add the mushrooms and shallots with the remaining 1/2 tsp salt. Cook for 8–10 minutes, stirring occasionally, until the mushrooms release their moisture and then turn golden-brown. This browning step builds the pie’s deep, bistro-style flavor.
Stir in the garlic and cook for 30 seconds, just until fragrant.
Step 4: Build the creamy tarragon sauce
Sprinkle the flour over the mushrooms and stir well so there are no dry pockets. Cook the flour for 1 minute, stirring constantly.
If using wine, slowly pour in 120 ml (1/2 cup) dry white wine while stirring, scraping up any browned bits. Simmer for 1–2 minutes to reduce slightly.
Slowly pour in 300 ml (1 1/4 cups) chicken stock, stirring constantly. Bring to a gentle simmer and cook for 3–4 minutes, until thickened to a gravy-like consistency. If it seems too thick, add up to 60 ml (1/4 cup) extra stock.
Reduce heat to low and stir in the heavy cream, Dijon mustard, chopped tarragon, and a few grinds of black pepper.
Step 5: Finish the filling and cool briefly
Add the browned chicken (and any juices on the plate) back into the pan. Simmer gently for 3–5 minutes, stirring occasionally, until the chicken is cooked through and the sauce coats everything nicely.
Taste and adjust seasoning with more salt and pepper as needed. Remove from heat.
Let the filling cool for 15 minutes. This helps prevent the puff pastry from melting before it hits the oven, which keeps the lid flaky.
Step 6: Assemble the pie with a flaky puff pastry lid
Spoon the warm (not piping hot) filling into your pie dish and level the top.
Lightly flour a work surface and roll the puff pastry just enough to fit your dish with about a 1.5 cm / 1/2-inch overhang. Lay the pastry over the filling.
Trim excess pastry if needed. Crimp the edges against the rim of the dish (use a fork or your fingers). Cut 2–3 small vents in the top so steam can escape.
Make the egg wash by whisking together the egg and water (and a pinch of salt, if using). Brush a thin, even layer over the pastry lid.
Step 7: Bake until golden and bubbling
Bake at 200°C (400°F) for 30–35 minutes, rotating the pan halfway through, until the pastry is deeply golden and you see bubbling around the edges.
Let the pie rest for 10 minutes before slicing. This rest time helps the sauce set slightly so servings hold together better.
Pro Tips
- Brown the mushrooms well: Don’t rush this step; golden edges mean richer flavor and less watery filling.
- Cool the filling before topping: Even 15 minutes helps keep puff pastry from slumping and improves flakiness.
- Control thickness before baking: The sauce should look like a thick gravy in the pan. If it’s thin, simmer 1–2 minutes longer before assembling.
- Use a baking sheet: Creamy pies love to bubble over; the sheet saves cleanup.
- Vent the lid: A couple of small slits keep the pastry crisp and prevent sogginess.
Variations
- Extra-veg version: Add 150 g (1 1/2 cups) frozen peas (thawed) or 150 g chopped leeks (sauté with the shallots).
- No wine: Skip the wine and replace with an additional 120 ml (1/2 cup) chicken stock. Add 1 tsp lemon juice at the end for a similar lift (optional).
- Double-crust (more pastry): Line the dish with a sheet of shortcrust pastry, blind bake at 190°C (375°F) for 15 minutes, then fill and top with puff pastry. (This is more work but very classic.)
Storage & Make-Ahead
Refrigerate: Cool leftovers completely, then cover and refrigerate for up to 4 days. Reheat slices on a baking sheet at 180°C (350°F) for 15–20 minutes until hot (the oven helps the pastry re-crisp better than the microwave).
Freeze (baked): Cool completely, wrap well, and freeze for up to 2 months. Thaw overnight in the fridge, then reheat at 180°C (350°F) for 25–35 minutes.
Make-ahead option: Make the filling up to 2 days ahead and refrigerate. Assemble with pastry just before baking (add 5 minutes to bake time if the filling is very cold).
Nutrition (per serving)
Approximate per serving (1/6 of pie): 560 calories, 32 g protein, 34 g fat, 34 g carbohydrates, 3 g fiber, 750 mg sodium. Values vary by specific brands of puff pastry, stock, and cream used.
