Savory mushroom and spinach quiche combines browned mushrooms, tender greens, and a creamy egg filling inside a crisp pie crust. Cheddar brings a mellow sharpness, Parmesan adds a salty finish, and a small onion gives the vegetables a sweet base. It works for brunch, lunch, or a light dinner, and the slices travel well once the quiche has cooled.
RECIPE CARD
Savory Mushroom and Spinach Quiche
Ingredients
- 1 ready-made or homemade pie crust, fitted to a 9-inch pie dish
- 1 tablespoon olive oil
- 1 small onion, finely chopped
- 200 g sliced cremini or button mushrooms
- 2 cups fresh spinach, roughly chopped
- 3 large eggs
- 1/2 cup heavy cream or whole milk
- 1/2 cup grated cheddar cheese
- 1/4 cup grated Parmesan cheese
- Salt and freshly ground black pepper, to taste
- A pinch of ground nutmeg, optional
- Fresh thyme or parsley, optional garnish
Quick Method
Condensed overview. Use Full Instructions for the complete method, timing and doneness details.
- Prepare the Vegetables: Heat the oven to 350°F (180°C). Warm the olive oil in a large skillet over medium heat. Add the onion and cook for 3…
- Make the Egg Filling: Whisk the eggs and heavy cream or whole milk in a large bowl until the yolks and whites are combined. Stir in the cheddar…
- Assemble the Quiche: Set the fitted pie crust in its dish on a sturdy baking sheet; this makes the filled quiche easier to move. Give the custard…
- Bake Until Set: Bake on the center rack of the preheated oven for 30 to 35 minutes. The edge should be golden and the filling should look…
- Rest, Slice, and Serve: Let the quiche stand for about 10 minutes before slicing. This short rest helps the custard settle and makes the wedges easier to lift…
The key is to cook away the moisture from the mushrooms and spinach before they meet the eggs. A wet filling can soften the pastry and make the center slow to set. Use a nine-inch pie dish and a ready-made or homemade crust; then give the baked quiche a short rest so you can cut neat wedges without losing the creamy texture.
Why You’ll Love It
- Rich but balanced: earthy mushrooms and spinach keep the cheese and custard from feeling heavy.
- Flexible meal: serve it warm for brunch or at room temperature with a salad.
- Practical to make ahead: the filling can be prepared while the oven heats, and the finished slices reheat gently.
Ingredients
- 1 ready-made or homemade pie crust, fitted to a 9-inch pie dish
- 1 tablespoon olive oil
- 1 small onion, finely chopped
- 200 g sliced cremini or button mushrooms
- 2 cups fresh spinach, roughly chopped
- 3 large eggs
- 1/2 cup heavy cream or whole milk
- 1/2 cup grated cheddar cheese
- 1/4 cup grated Parmesan cheese
- Salt and freshly ground black pepper, to taste
- A pinch of ground nutmeg, optional
- Fresh thyme or parsley, optional garnish
Choose a crust that fits the dish without stretching it, and keep it cool until the filling is ready. Cremini mushrooms give a deeper color, while button mushrooms have a milder taste. Heavy cream makes a richer custard; whole milk gives a lighter finish. Both cheeses should be grated so they disperse evenly rather than clumping in one part of the quiche.
Step-by-Step Instructions
Step 1: Prepare the Vegetables
Heat the oven to 350°F (180°C). Warm the olive oil in a large skillet over medium heat. Add the onion and cook for 3 to 4 minutes, stirring, until soft and translucent. Add the mushrooms and cook for 5 to 7 minutes, until their released moisture has mostly evaporated and their edges begin to brown. Stir in the spinach and cook for 1 to 2 minutes, just until wilted. Take the pan off the heat and let the vegetables cool slightly. If liquid remains in the skillet, leave it behind when transferring the vegetables; excess water can make the custard loose and the pastry soggy.
Step 2: Make the Egg Filling
Whisk the eggs and heavy cream or whole milk in a large bowl until the yolks and whites are combined. Stir in the cheddar and Parmesan, then season with a modest pinch of salt, black pepper, and optional nutmeg. Remember that Parmesan already contributes salt. Fold in the slightly cooled mushroom and spinach mixture so the vegetables spread through the liquid. Do not add the vegetables while they are still steaming hot; cooling them briefly keeps the eggs from starting to set in the bowl. A gentle stir is enough once everything is evenly distributed.
Step 3: Assemble the Quiche
Set the fitted pie crust in its dish on a sturdy baking sheet; this makes the filled quiche easier to move. Give the custard one last stir and pour it into the shell, guiding any mushrooms or spinach into sparse areas. Keep the filling below the top of the pastry so it does not spill as you carry the tray to the oven. Smooth the surface lightly with a spoon. If your particular crust is shallow, stop pouring before the rim and bake any extra custard separately in a small greased oven-safe dish. Do not force excess liquid into the shell.
Step 4: Bake Until Set
Bake on the center rack of the preheated oven for 30 to 35 minutes. The edge should be golden and the filling should look set around the outside with only a slight movement at the center when the dish is nudged. A knife inserted near the center should come out without liquid egg clinging to it. Oven heat and crust depth vary, so allow a few more minutes if the center is still visibly wet. If the pastry edge darkens too quickly, cover just that edge loosely with foil while the filling finishes. Remove the quiche carefully from the oven.
Step 5: Rest, Slice, and Serve
Let the quiche stand for about 10 minutes before slicing. This short rest helps the custard settle and makes the wedges easier to lift from the dish. Cut into six slices and add a few fresh thyme leaves or parsley if you like. Serve warm, or let it cool further for a room-temperature meal. Avoid sealing a steaming-hot quiche in a container, which traps moisture against the pastry. Refrigerate leftovers promptly once cooled and warm individual slices gently rather than overheating the whole pie.
Substitutions & Variations
Whole milk can replace cream for a lighter filling; keep the measured amount the same. Try Gruyère in place of cheddar for a nuttier flavor, but retain the total cheese volume so the custard stays balanced. A gluten-free pie crust works if it fits the dish and follows its package baking directions. For a crustless version, grease a baking dish and pour in the same filling, then watch for a fully set center rather than relying only on the pastry-based timing. If you use frozen spinach, thaw it completely and squeeze out the water before adding it to the pan.
What to Serve With
A crisp green salad cuts through the creamy filling, while a cup of butternut squash soup with sage and thyme makes a cozy lunch. For a brighter brunch table, add a small serving of watermelon and mint salad. The quiche is already rich with cheese, so keep side portions light and fresh. A simple plate of sliced fruit works well too, especially if serving the quiche at room temperature.
Frequently Asked Questions
Can I prepare the quiche ahead of time?
Yes. Bake it, cool it, and refrigerate it in a covered container. Reheat slices gently in the oven until warmed through. The crust will be crisper this way than if reheated in a microwave. Add fresh herbs just before serving.
Why is my quiche watery?
Mushrooms and spinach release considerable liquid. Cook the mushrooms until their moisture evaporates, wilt the spinach briefly, and leave any pooled liquid in the skillet. Also make sure the center is set before removing the quiche from the oven.
Can I use a different cheese?
Yes. Gruyère can replace cheddar, and a little crumbled goat cheese can replace part of it. Keep the overall quantity close to the listed amount so the egg mixture bakes at a similar thickness. Taste salty cheeses before adding extra salt.