Creamy Mushroom Leek Pie (Printable)
Savory dish with creamy mushroom and leek filling topped by buttery mashed potatoes and baked golden.
# What You'll Need:
→ Potato Topping
01 - 2 lbs Yukon Gold potatoes, peeled and cubed
02 - 1/4 cup whole milk
03 - 3 tbsp unsalted butter
04 - 1/2 cup grated Parmesan cheese (optional)
05 - Salt and freshly ground black pepper, to taste
→ Mushroom & Leek Filling
06 - 2 tbsp olive oil
07 - 1 tbsp unsalted butter
08 - 2 large leeks, white and light green parts only, sliced
09 - 3 garlic cloves, minced
10 - 1 lb mixed mushrooms, cleaned and sliced
11 - 2 medium carrots, diced
12 - 2 celery stalks, diced
13 - 1 tsp fresh thyme leaves
14 - 1 tsp fresh rosemary, chopped
15 - 2 tbsp all-purpose flour
16 - 1 cup vegetable broth
17 - 1/2 cup heavy cream
18 - 1 tsp Dijon mustard
19 - 1/2 cup frozen peas
20 - Salt and pepper, to taste
# How To Make It:
01 - Preheat oven to 400°F.
02 - In a large pot, cover potatoes with cold salted water. Bring to a boil and cook until fork-tender, about 15–20 minutes. Drain and return to pot.
03 - Add milk, butter, Parmesan (if using), salt, and pepper to the potatoes. Mash until smooth and creamy. Set aside.
04 - Heat olive oil and butter in a large skillet over medium heat. Add leeks and sauté until soft, about 5 minutes. Add garlic and cook for another minute.
05 - Stir in mushrooms, carrots, and celery. Sauté until vegetables are softened and mushrooms release their liquid, about 8–10 minutes.
06 - Add thyme and rosemary. Sprinkle flour over the vegetables and cook, stirring, for 2 minutes.
07 - Gradually stir in vegetable broth, scraping any browned bits from the pan. Add cream and Dijon mustard. Simmer for 5 minutes, until thickened.
08 - Stir in peas and season generously with salt and pepper. Remove from heat.
09 - Transfer the filling to a 2-quart baking dish. Spread mashed potatoes evenly over the top. Use a fork to create ridges for extra crispiness.
10 - Bake for 25 minutes, or until the top is golden brown and the filling is bubbling. For a crispier top, broil for an additional 2–3 minutes.
11 - Let rest for 10 minutes before serving.
# Expert Tips:
01 -
- The mushroom filling creates such deep savory flavor nobody will miss the meat
- Make it ahead and bake when needed, perfect for stress-free entertaining
02 -
- The filling must cool slightly before topping or the potatoes can melt into it instead of staying distinct
- Creating ridges with your fork isn't just pretty, it creates more crispy surface area for texture contrast
03 -
- Use a potato ricer for the smoothest mash if you have one, but a regular masher works perfectly fine
- Warm your milk slightly before adding it to the potatoes for easier incorporation