Caramelized Onion and Spinach Quiche

Name: Caramelized Onion and Spinach Quiche
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Yield: 8 servings
Ingredients: 1 1/4 cups all-purpose flour; 1/4 tsp salt; 1/2 cup unsalted butter, chilled and diced; 1/4 cup ice water; 3 medium onions, thinly sliced; 2 cups fresh spinach, chopped; 4 large eggs; 1 cup heavy cream; 1 cup grated Gruyère cheese; 1/2 cup crumbled feta cheese; Salt and pepper to taste

Highlighted under: Comfort Food Recipes

I adore making this Caramelized Onion and Spinach Quiche for brunch gatherings or cozy family breakfasts. The sweet, rich flavor of caramelized onions perfectly complements the earthy taste of spinach, and the creamy custard melds everything together beautifully. I’ve discovered that using a mix of fresh and aged cheeses elevates the dish, adding depth to each bite. This quiche not only looks stunning but also bursts with flavors that will keep everyone coming back for seconds!

Created by

Emily Carter

Last updated on 2026-01-07T21:57:28.095Z

When I first made this quiche, I knew I had stumbled upon something special. The onions caramelized perfectly, turning golden and sweet while the spinach added a beautiful depth of flavor and color. After several attempts, I learned that covering the onions while they cooked helped to draw out their natural sweetness more efficiently, so try this technique for the best results!

Additionally, I love experimenting with different cheese blends. A combination of Gruyère and feta gives the quiche a rich flavor profile with a hint of tanginess, making it an instant favorite among family and friends. Serve it warm for breakfast or even at dinner; it’s versatile and always a hit.

        Why You'll Love This Quiche
        Perfect balance of sweet and savory flavors
A flaky homemade crust that crumbles beautifully
Great for brunch, lunch, or dinner

      

Understanding the Flavors

Caramelized onions are the star of this quiche, providing a sweet and mellow flavor that balances the earthiness of the spinach. The slow cooking process, around 20 minutes over medium heat, transforms sharp raw onions into soft, rich morsels that contribute both flavor and texture. Make sure to stir frequently to prevent burning and achieve that beautiful, deep golden hue which indicates that they are perfectly caramelized.

The combination of Gruyère and feta cheeses creates a delightful contrast in flavors. Gruyère is nutty and creamy, melting into the custard seamlessly, while feta adds a tangy, salty kick. This blend not only enhances the quiche's taste but also helps it achieve a luscious, creamy texture. For a twist, consider swapping out Gruyère for a sharp cheddar or adding a sprinkle of goat cheese for more tang.

Making the Perfect Crust

Creating a flaky crust is crucial for any quiche, and chilling the ingredients is key. Using chilled butter and ice water helps develop the ideal texture, preventing the crust from becoming tough. When mixing, only combine until the dough just forms—a few visible lumps of butter should remain. This ensures those buttery pockets melt during baking, creating a light and airy crust.

After rolling out the chilled dough, be gentle when transferring it to the pie pan. Press the dough into the edges lightly to avoid tearing, and always trim excess dough to prevent it from burning in the oven. For added flavor, try incorporating herbs, like thyme or rosemary, into your crust for a delightful aroma that complements the filling beautifully.

Ingredients

Gather the following ingredients to make your delicious quiche:

For the Crust

1 1/4 cups all-purpose flour
1/4 tsp salt
1/2 cup unsalted butter, chilled and diced
1/4 cup ice water

For the Filling

3 medium onions, thinly sliced
2 cups fresh spinach, chopped
4 large eggs
1 cup heavy cream
1 cup grated Gruyère cheese
1/2 cup crumbled feta cheese
Salt and pepper to taste

Once you have your ingredients ready, let’s move on to the cooking!

Instructions

Follow these simple steps to create a mouthwatering quiche:

Prepare the Crust

In a bowl, combine flour and salt. Cut in butter until mixture resembles coarse crumbs. Stir in ice water gradually until the mixture forms a ball.

Wrap the dough in plastic wrap and refrigerate for 30 minutes.

Caramelize the Onions

In a skillet over medium heat, add a tablespoon of oil and the sliced onions. Cook, stirring often, for about 20 minutes, or until the onions are deeply caramelized. Season with salt and pepper, then set aside.

Prepare the Filling

In another skillet, sauté the spinach until wilted. In a bowl, whisk together the eggs and cream. Stir in the Gruyère, feta, caramelized onions, and spinach, mixing well.

Bake the Quiche

Preheat the oven to 375°F (190°C). Roll out the chilled crust and fit it into a pie pan. Pour the filling into the crust and bake for 35-40 minutes, or until the center is set and the top is lightly golden.

Cool and Serve

Allow the quiche to cool for about 10 minutes before slicing. Serve warm, and enjoy the delightful flavors!

Enjoy your homemade quiche with a side salad or as a standalone dish.

Pro Tips

Using a combination of cheeses can enhance the flavor. Don't rush the caramelization of the onions for maximum sweetness.

Storage and Reheating Tips

If you have leftovers, store your quiche in an airtight container in the refrigerator for up to three days. To maintain its flaky crust, cover it with foil or wax paper. You can also freeze the quiche before baking—just wrap it tightly in plastic wrap and foil. It can last up to two months in the freezer, making it a fantastic make-ahead option for busy weeks.

To reheat, place the quiche in a preheated oven at 350°F (175°C) for about 20-25 minutes or until heated through. If you’re reheating from frozen, allow it to thaw in the fridge overnight for easier heating. Cover it with foil initially to prevent over-browning before removing it for the last few minutes until the cheese is bubbly.

Serving Suggestions

This Caramelized Onion and Spinach Quiche can be served hot or at room temperature, making it versatile for any occasion. Pair it with a fresh green salad dressed in lemon vinaigrette for a delightful brunch presentation. A dollop of sour cream or Greek yogurt can also enhance the richness of the quiche, providing a creamy contrast.

For an added burst of flavor, consider topping each slice with fresh herbs like chives or parsley just before serving. You can even sprinkle a dash of smoked paprika on top for a surprising twist that plays off the savory filling beautifully. Your guests will appreciate the extra effort and flavor boost!

Questions About Recipes

→ Can I use frozen spinach instead of fresh?

Yes, you can use frozen spinach, but make sure to thaw and drain it well to avoid excess moisture.

→ How can I make this quiche gluten-free?

You can use a gluten-free pie crust or make a crustless version by skipping the crust entirely.

→ Can I prepare this quiche ahead of time?

Absolutely! You can prepare it a day in advance and reheat it in the oven before serving.

→ What can I use as a substitute for eggs?

You can use a mixture of silken tofu blended with a tablespoon of nutritional yeast for each egg.