Caramelized Onion and Gruyère Tart

Name: Caramelized Onion and Gruyère Tart
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Yield: 8 servings
Ingredients: 1 sheet of puff pastry; 2 large onions, thinly sliced; 2 tablespoons olive oil; 1 teaspoon sugar; Salt and pepper to taste; 1 cup grated Gruyère cheese; 2 large eggs; 1/2 cup heavy cream; 1 tablespoon fresh thyme leaves

Highlighted under: Artisan Bakery Recipes

This Caramelized Onion and Gruyère Tart is a savory delight, perfect for a brunch or a light dinner. With its flaky pastry and rich filling, it's sure to impress your guests.

Created by

Emily

Last updated on 2026-01-03T22:55:28.252Z

This tart is a celebration of flavors, with sweet caramelized onions harmonizing beautifully with nutty Gruyère cheese.

        Why You'll Love This Tart
        The sweetness of caramelized onions brings depth to every bite.
Rich, nutty Gruyère adds a luxurious touch.
Perfect for sharing at gatherings or enjoying as a comforting meal.

      

Perfect for Any Occasion

The Caramelized Onion and Gruyère Tart is an incredibly versatile dish that can elevate any meal. Whether you're hosting a lavish brunch or a cozy dinner at home, this tart serves as an elegant centerpiece. Its rich flavors and beautiful presentation make it suitable for formal gatherings as well as casual family meals.

Moreover, this tart is not just delicious but also impressively easy to prepare. With just a few simple steps, you can create a dish that looks like it came straight from a gourmet kitchen. The combination of sweet onions and savory cheese will leave your guests raving about your culinary skills.

Flavor Profile

The unique flavor profile of this tart is one of the key reasons it stands out. Caramelized onions add a natural sweetness that balances beautifully with the nutty and rich Gruyère cheese. Together, they create a complex taste experience that satisfies both savory and sweet cravings.

Additionally, the fresh thyme contributes a subtle earthiness that enhances the overall dish. This herb not only complements the other ingredients but also adds a fragrant aroma while baking, making your kitchen smell divine. Each bite of this tart is a delightful journey of flavors that you won't soon forget.

Serving Suggestions

This Caramelized Onion and Gruyère Tart is best enjoyed warm, making it a comforting dish to serve straight from the oven. Pair it with a fresh green salad dressed in a light vinaigrette for a balanced meal. The acidity of the dressing will cut through the richness of the tart, enhancing the overall dining experience.

For a more indulgent occasion, consider serving it alongside a glass of white wine, such as a crisp Sauvignon Blanc or a buttery Chardonnay. The wine will complement the flavors of the cheese and onions beautifully, elevating your meal to a gourmet level.

Ingredients

For the Tart

1 sheet of puff pastry
2 large onions, thinly sliced
2 tablespoons olive oil
1 teaspoon sugar
Salt and pepper to taste
1 cup grated Gruyère cheese
2 large eggs
1/2 cup heavy cream
1 tablespoon fresh thyme leaves

Instructions

Prepare the Onions

In a large skillet, heat the olive oil over medium heat. Add the sliced onions and sugar, cooking until the onions are caramelized, about 25 minutes. Stir occasionally and season with salt and pepper.

Assemble the Tart

Preheat the oven to 375°F (190°C). Roll out the puff pastry and place it in a tart pan. Spread the caramelized onions over the pastry, then sprinkle the Gruyère cheese on top.

Mix the Egg and Cream

In a bowl, whisk together the eggs, heavy cream, and thyme. Pour the mixture over the onions and cheese in the tart.

Bake the Tart

Bake in the preheated oven for 30-35 minutes, or until the tart is golden brown and the filling is set. Allow to cool slightly before serving.

Storage Tips

If you have leftovers or want to make the tart ahead of time, proper storage is essential to maintain its flavor and texture. Allow the tart to cool completely before wrapping it tightly in plastic wrap or aluminum foil. Store it in the refrigerator, where it can last for up to 3 days without losing its deliciousness.

For longer storage, consider freezing the tart. Wrap it securely and place it in an airtight container. It can be frozen for up to 2 months. To reheat, simply thaw in the refrigerator overnight and then warm it in the oven until heated through and crispy.

Variations

Feel free to get creative with this tart! You can add different ingredients to suit your taste or dietary preferences. For example, incorporating sautéed mushrooms or spinach can add even more depth of flavor and nutrition. You might also experiment with various cheeses, like feta or goat cheese, for a unique twist.

If you're looking for a gluten-free option, consider using a gluten-free pastry or making a crustless version by simply baking the filling in a greased tart pan. The possibilities are endless, making this recipe a wonderful canvas for your culinary creativity.

Questions About Recipes

→ Can I use a different type of cheese?

Yes, you can substitute Gruyère with Emmental or even a sharp cheddar for a different flavor.

→ How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator for up to 3 days.

→ Can I make this tart ahead of time?

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

→ What can I serve with this tart?

This tart pairs well with a light salad or a glass of white wine.