2 tbsp all-purpose flour (or 2 tbsp cornstarch/tapioca for gluten-free; mix with cold liquid first)
1/2 cup dry white wine or extra broth (optional)
1 1/2 cups vegetable or chicken broth — warm
3/4 cup heavy cream or half-and-half (or full-fat coconut milk for dairy-free)
1 tsp fresh thyme leaves (or 1/2 tsp dried)
1 tbsp soy sauce or tamari (optional)
Salt and freshly ground black pepper — to taste
1 sheet puff pastry or refrigerated pie crust — thawed if frozen (or gluten-free crust / mashed-potato topping)
1 egg beaten with 1 tbsp water — for egg wash (optional)
2/3 cup frozen peas (optional)
Fresh parsley, chopped — for garnish
Instructions
Prep the mushrooms and aromatics: Wipe mushrooms with a damp towel and slice. Chop onion, carrot, and celery (or leek). Warm the broth so it’s ready to add.
Sauté until deeply golden: In a wide skillet over medium-high heat, melt butter with oil. Add mushrooms in a single layer (do in batches if necessary) so they brown instead of steam. Cook 6–8 minutes per batch, stirring occasionally, until edges are caramelized and their liquid has mostly evaporated.
Build the flavor base: Reduce heat to medium, add onion, carrot, and celery; sauté until soft and translucent, about 4–5 minutes. Add garlic and thyme in the last 30 seconds.
Add flour to thicken: Sprinkle the flour over the vegetables and mushrooms, stirring to coat. Cook 1–2 minutes to remove the raw flour taste; it will form a light paste and look slightly toasted.
Deglaze and simmer: Pour in the white wine (if using) and scrape browned bits from the pan. Let it reduce by half, about 1–2 minutes. Gradually whisk in warm broth until smooth. Bring to a simmer and cook 4–6 minutes until the sauce thickens slightly.
Finish the filling: Stir in cream (or coconut milk) and soy sauce; simmer gently 2–3 minutes. Add peas now if using. Taste and season with salt and pepper.
Cool slightly before filling: Transfer filling to a bowl and let it cool 10–15 minutes so it’s warm, not piping hot to avoid soggy crust.
Assemble the pie: Preheat oven to 400°F (205°C). Pour the filling into a 9-inch pie dish or individual ramekins. Lay the rolled pastry over the top, tucking edges and trimming excess. Cut vents in the top to release steam.
Egg wash and bake: Brush pastry with beaten egg for a glossy finish. Bake on a middle rack for 22–30 minutes (individual pies: 18–22 minutes) until the crust is deep golden and the filling bubbles at the vents.
Rest and serve: Let the pie sit 8–10 minutes before slicing so the filling sets. Garnish with chopped parsley and serve.
Notes
A cozy, savory Creamy Mushroom Pot Pie with browned mixed mushrooms, a velvety cream sauce, and a golden puff pastry top. Easily adaptable for dairy-free, gluten-free, or vegan diets and great for make-ahead meals or individual pies.
