Spinach Mushroom Quiche
A rich, velvety spinach mushroom quiche with a shatteringly flaky golden crust, perfectly sautéed mushrooms, and tender spinach.
- Squeezing the spinach dry prevents water from weeping into the egg custard during baking.
- Sautéing mushrooms to a deep golden brown triggers the Maillard reaction, maximizing savory depth.
- A high-fat dairy ratio using heavy cream ensures a velvety, luxurious texture that never turns spongy.
My first attempt at making a quiche was a soggy, weeping disaster that pooled at the bottom of a cheap, disposable aluminum pie tin. I was twenty-two, hosting my first brunch, and too proud to admit I had no idea how to handle wet vegetables.
The crust was absolute mush.
Mushrooms and spinach are packed with water that releases violently under heat, turning your custard into a watery soup. If you don't cook that moisture out first, your pastry stands absolutely zero chance of staying crisp.
The fix is incredibly simple: we sauté the cremini mushrooms until they are deeply browned and squeeze the cooked spinach in a clean kitchen towel until our knuckles turn white. This step concentrates the earthy, umami flavors while protecting the structural integrity of the egg matrix. Then, we whisk heavy cream and whole eggs in a precise ratio to guarantee a silky, melt-in-your-mouth texture that sets beautifully without becoming rubbery.
Bear with me here, because the pan you choose actually matters. I tested this with three different store-bought crusts, and the generic supermarket brand slumped and shrank down the sides of the dish miserably because it lacked enough shortening.
If you love this classic flavor pairing but want something a bit faster for a Friday night, try another option. My Spinach Mushroom & Brie Flatbread uses a very similar flavor profile on a crispy flatbread base.
Spinach Mushroom Quiche
Ingredients
- 1 unbaked 9-inch pie crust (store-bought or homemade)
- 2 tbsp unsalted butter
- 8 oz cremini mushrooms, sliced
- 1 small yellow onion, finely diced
- 2 cloves garlic, minced
- 5 oz fresh baby spinach
- 4 large eggs
- 1 cup heavy cream
- 1/2 cup whole milk
- 1 tsp Diamond Crystal kosher salt
- 1/4 tsp freshly cracked black pepper
- 1/8 tsp ground nutmeg
- 1 cup Gruyère cheese, shredded (divided)
Directions
- Preheat the oven to 375°F (190°C). Roll out your pie crust into a 9-inch pie plate, crimp the edges, line with parchment paper, fill with pie weights, and blind-bake for 15 minutes. Remove weights and bake for another 5 minutes until lightly golden.
- Melt the butter in a large skillet over medium-high heat. Add the sliced mushrooms and cook without stirring for 3 minutes to develop a deep sear, then stir and cook until all moisture has evaporated.
- Lower the heat to medium, add the diced onion and minced garlic, and sauté for 4 minutes until soft and fragrant. Toss in the fresh spinach, cooking just until wilted, then transfer the mixture to a colander to cool slightly.
- Once cool enough to handle, wrap the spinach and mushroom mixture in a clean kitchen towel and squeeze firmly to remove any excess liquid.
- In a medium bowl, whisk together the eggs, heavy cream, whole milk, kosher salt, black pepper, and ground nutmeg until completely smooth and emulsified.
- Sprinkle half of the shredded Gruyère cheese over the bottom of the par-baked pie crust, layer the squeezed spinach and mushroom mixture on top, and cover with the remaining cheese.
- Slowly pour the egg custard mixture over the fillings, ensuring it settles evenly. Bake at 375°F (190°C) for 35 to 40 minutes, or until the edges are set and the center has a slight, gentle jiggle. Let cool for 15 minutes before slicing.
Notes
- I highly recommend using Diamond Crystal kosher salt; if you only have fine table salt, cut the measurement in half (use 1/2 teaspoon instead of 1 teaspoon) to avoid an over-salted custard.
- Squeezing the spinach is non-negotiable because water-soluble compounds in the greens will release during baking, breaking the protein matrix of the eggs and leaving you with a watery mess.
- Keep a close eye on your pie crust edges during the final bake; if they start browning too quickly, tent them loosely with strips of aluminum foil to prevent burning while the custard finishes setting.
- This quiche actually tastes even better after a day in the fridge, as the flavors settle and meld, though the crust will lose a bit of its initial shatteringly crisp texture.
Serving Suggestions
This quiche is a showstopper on its own, but pairing it with the right sides transforms it into an elegant, complete meal.
- A crisp, bright green salad dressed with a simple lemon-shallot vinaigrette to cut through the rich custard.
- A side of fresh seasonal berries or a light fruit spring rolls platter for a refreshing contrast.
- Crispy, golden roasted potatoes or a batch of Greek Feta Fries for a hearty brunch spread.
- A warm slice of Southern-Style Honey Butter Cornbread Poppers to add a touch of sweetness to the table.
Storage and Reheating
Leftovers keep beautifully in the refrigerator.
Simply wrap the pie dish tightly in plastic wrap or transfer individual slices to an airtight container. It will easily last for up to four days, making it a fantastic option for stress-free weekday breakfasts.
To reheat, avoid the microwave at all costs unless you enjoy rubbery eggs and a sad, soggy crust.
Instead, place your slice on a baking sheet and warm it in a 325°F (160°C) oven for about 10 to 12 minutes. This gently revives the custard's silky texture while crisping the buttery crust back to life.
Ingredient Substitutes
If you don't have everything on hand, don't panic—this recipe is highly adaptable.
- Gruyère Cheese: Swap in sharp white cheddar, Swiss, or fontina for a similarly rich, meltable cheese.
- Heavy Cream: You can use half-and-half, but avoid using all whole milk or skim milk, as the custard will lose its luxurious texture and may weep.
- Cremini Mushrooms: White button mushrooms or wild mushrooms like shiitake work beautifully as substitutes.
- Pie Crust: If you are short on time or avoiding gluten, try making a Crustless Spinach Quiche instead.
There is something deeply satisfying about pulling a perfectly puffed, golden quiche out of the oven and hearing that delicate crackle of the crust as you slice into it. It turns any ordinary morning into a quiet celebration, and I hope it brings as much warmth to your table as it does to mine.
Susan Rosie
I've spent over 12 years perfecting recipes so you can cook with confidence. Every dish on Storied Skillet is tested multiple times – because your dinner matters. I believe in simple ingredients, clear instructions, and big flavors.
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