Duck Egg Quiche Recipe with Silky Custard

This duck egg quiche is a savory baked custard made with rich duck eggs, spinach, Gruyère, and a crisp pastry crust. Duck eggs give the filling a full, silky texture, while sautéing the spinach first keeps excess moisture from softening the crust.

Ingredients

1 refrigerated 9-inch pie crust, fitted into a pie plate (about 9 oz / 255 g)
4 duck eggs (about 10 oz / 280 g without shells)
1 cup whole milk (240 ml)
1/2 cup heavy cream (120 ml)
1 cup shredded Gruyère cheese (about 4 oz / 115 g)
5 oz fresh baby spinach (140 g)
1/2 small yellow onion, finely diced (about 1/2 cup / 75 g)
1 tsp olive oil (5 ml)
1/2 tsp fine salt (about 3 g)
1/4 tsp freshly ground black pepper (about 0.5 g)
1/8 tsp ground nutmeg (about 0.25 g)

Instructions

Heat the oven and prepare the crust. Set a rack in the lower-middle position and heat the oven to 375°F (190°C). Fit the refrigerated crust into a 9-inch pie plate, pressing it gently into the corners without stretching it. Trim or fold the overhang, then prick the bottom several times with a fork. Line the crust with parchment and fill it with pie weights or dry beans. Bake for 15 minutes, remove the weights and parchment carefully, then bake for 5 minutes more. The base should look dry and just beginning to color. Set the crust aside while you make the filling.
Cook the vegetables. While the crust bakes, warm the olive oil in a skillet over medium heat. Add the diced onion and cook for 3 to 4 minutes, stirring, until softened but not browned. Add the spinach in handfuls and stir for about 2 minutes, just until wilted. Transfer the mixture to a plate and spread it out so steam can escape. If liquid collects in the pan, drain it; a wet filling can make the pastry soggy.
Mix the custard. In a medium bowl, whisk the duck eggs until the yolks and whites are fully combined. Whisk in the milk, cream, salt, pepper, and nutmeg. Avoid beating in lots of air: a few small bubbles are fine, but a frothy mixture can puff in the oven and fall as it cools.
Fill the pastry. Reduce the oven temperature to 350°F (175°C). Scatter the spinach and onion evenly over the prebaked crust, then sprinkle the Gruyère on top. Pour the egg mixture over the filling. Place the pie plate on a rimmed baking sheet to make it easier to move and to catch any small spills.
Bake until the center is safely set. Bake for about 40 to 48 minutes. Begin checking at 40 minutes: the outer portion should be set, while the center may have a slight, gentle wobble. Check the center with a food thermometer; USDA FSIS lists 160°F (71°C) as the safe minimum internal temperature for egg dishes. If the top browns before the center reaches that temperature, loosely cover it with foil and continue baking, checking again after a few minutes.
Rest before slicing. Set the quiche on a cooling rack and leave it for 30 minutes. The custard will finish settling, making cleaner slices and reducing the chance that the filling will run. Cut into six wedges and serve warm or at room temperature.

Tips

Drain the greens well. Spinach releases water as it cooks. Let it steam off on a plate and blot it if it still looks wet before adding it to the crust. If using frozen spinach instead, thaw it completely and squeeze out as much liquid as possible; use 4 oz (115 g) after squeezing.
Protect the crust. Blind-baking the pastry gives the bottom a head start before the liquid custard goes in. If the crust edge darkens quickly during the final bake, cover just the rim with a pie shield or strips of foil rather than covering the whole quiche.
Use a thermometer, not just color. A golden top does not tell you whether the center has reached a safe temperature, and the center can look a little soft even when it is nearly done. Check at the middle of the filling without letting the thermometer touch the pie plate.
Adjust for your crust. Store-bought crusts vary in thickness and package directions. If yours is labeled deep-dish or needs a different blind-baking method, follow its package guidance while keeping the filling quantity in mind. A standard 9-inch shell should be filled with space left at the top, not brimmed.

Serving Suggestions

Serve a wedge warm for brunch or lunch with a lightly dressed green salad. A sharp vinaigrette, sliced radishes, or crisp cucumber gives a fresh contrast to the buttery crust and rich custard. For a more filling meal, add roasted potatoes, a bowl of tomato soup, or simply some toasted bread. The quiche is substantial, so a small side is usually enough.

For a brunch spread, cut the quiche into six larger wedges or eight smaller portions and offer fruit, a green salad, and coffee or tea alongside it. It is also good at room temperature, which makes it convenient when guests are serving themselves. Avoid leaving it out for an extended gathering: refrigerate perishable leftovers within two hours, or sooner if the room is very warm.

Variations

Swap the cheese: Swiss cheese is a close stand-in for Gruyère and keeps a similar nutty character. Sharp cheddar gives a more pronounced, tangy flavor, while goat cheese makes the filling creamier and more assertive. Keep the total amount close to 1 cup so the custard still sets well.

Try other vegetables: Replace the spinach with 1 cup (about 150 g) sautéed mushrooms, or use a mixture of mushrooms and spinach. Cook vegetables until their moisture has evaporated before adding them. Roasted red pepper can also work; pat it dry and dice it finely so it does not add excess liquid.

Add a savory extra: Stir in 1/3 cup (about 50 g) finely chopped cooked ham or crisp cooked bacon. The quiche itself still needs to reach 160°F (71°C) in the center because it contains egg custard. Reduce the salt slightly if the meat and cheese are both salty.

Make it without spinach: Use sautéed leeks, cooked broccoli florets, or a combination of vegetables instead. Chop ingredients into small pieces so each slice holds together, and cook them first to drive off moisture. For a crustless version, butter a 9-inch pie plate, add the filling, and bake until the center reaches 160°F (71°C); expect a somewhat softer edge and a less sliceable result.

Storage and Reheating

Let leftovers cool, then refrigerate them within two hours of baking in a covered container or wrapped tightly. Keep the quiche refrigerated for 3 to 4 days. You can store the whole quiche or individual wedges; slices are convenient for quick meals and cool more evenly in a shallow container. Do not leave cooked egg dishes at room temperature for longer than two hours.

To reheat a slice, place it on a baking sheet in a 325°F (165°C) oven for about 12 to 18 minutes, depending on its thickness. Cover it loosely with foil if the crust is already dark. Reheat leftovers to 165°F (74°C), checking the center with a food thermometer. A microwave also works for a single portion: heat in short intervals, checking the middle, though the crust will be softer rather than crisp.

For longer storage, freeze cooled portions in airtight freezer-safe wrapping for up to 2 months for best quality. Thaw overnight in the refrigerator and reheat to 165°F (74°C). Freezing may make the custard a little less smooth, but individually wrapped wedges are still handy for a future lunch.

Frequently Asked Questions

Can I use chicken eggs instead of duck eggs?

Yes. Four duck eggs weigh roughly as much as five large chicken eggs, though egg sizes vary. For a similar amount of custard, use 5 large chicken eggs and keep the milk and cream amounts the same. The result will be slightly less rich, but it will still bake into a tender quiche.

Do duck eggs change the flavor?

They make the custard taste richer and feel a little silkier than a version made with chicken eggs. Their flavor is not usually overwhelming, especially with spinach and Gruyère. If you are new to duck eggs, this classic savory filling is a balanced way to use them.

Why is my quiche watery?

Excess water usually comes from vegetables that were not cooked or drained enough, or from cutting the quiche before it had time to rest. Cook spinach until wilted, let its steam escape, and drain any liquid. Check that the center reaches 160°F (71°C), then allow the full 30-minute rest before slicing.

Can I make the quiche ahead?

Yes. Bake it fully, cool it, and refrigerate it covered for up to 3 to 4 days. Reheat portions in the oven for a crisper crust, or serve a chilled slice at room temperature after taking it out shortly before serving. You can also prepare the spinach and onion a day ahead and refrigerate them separately, then assemble and bake the quiche when needed.

Can I bake it in a different size pan?

A deep 9-inch pie plate is the best fit for the quantities here. A shallower or smaller dish may not hold all the filling, so do not pour it past the edge; bake any extra custard in a greased ramekin. A larger pan makes a thinner quiche that will likely bake faster, so check its temperature early and remove it when the center reaches 160°F (71°C).

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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