Savory Caramelized Onion and Brie Tart

Highlighted under: Classic Bakery Favorites

I adore making this Savory Caramelized Onion and Brie Tart whenever I have guests over or simply want to treat myself. The blend of sweet caramelized onions and creamy Brie creates an irresistible flavor profile that’s perfect for any occasion. The buttery crust is easy to work with and adds a delightful crunch to each bite. I love how this dish can transition seamlessly from a cozy evening snack to an elegant appetizer, making it a versatile addition to my recipe collection.

Mario

Created by

Mario

Last updated on 2026-01-08T14:26:31.871Z

When I first created this recipe, I wanted something that showcased the richness of caramelized onions paired with the smooth, decadent Brie cheese. Simmering the onions slowly allows their natural sugars to come out, which elevates the flavor so much. I remember watching them transform from sharp and pungent to sweet and melty, which was a true culinary joy.

While assembling the tart, I learned that using a chilled crust and not overworking the dough is key to achieving a flakier texture. I often sprinkle a little thyme on top before baking for an aromatic touch that balances the cheese's richness beautifully. It has definitely become a favorite in my kitchen!

Why You'll Love This Tart

  • Deliciously sweet and savory combination of flavors
  • Creamy Brie complements the caramelized onions perfectly
  • Ideal for brunch, dinner parties, or a cozy night in

The Art of Caramelizing Onions

Caramelizing onions might seem like a simple task, but timing and heat control are crucial. Begin with a medium heat to allow the natural sugars in the onions to break down slowly. Stir the onions every few minutes to prevent them from sticking or burning. You’ll know they’re ready when they turn a rich golden brown and become soft, which typically takes about 20-25 minutes. If you find they’re cooking too quickly or starting to scorch, lower the heat slightly. This slow cooking process gives the onions their sweet flavor that will beautifully complement the Brie.

To enhance the depth of flavor, consider adding a splash of balsamic vinegar or a pinch of fresh herbs towards the end of the caramelization. This can elevate your tart with an extra layer of complexity. Remember, letting the onions cool slightly before layering them on the crust will help maintain the structural integrity of your tart.

Choosing the Right Brie

The type of Brie cheese you select can significantly impact the flavor and texture of your tart. I recommend using a high-quality, creamy Brie with a soft rind, as this will melt beautifully during baking. If the rind seems too tough, feel free to remove it, but it does contribute to the flavor profile. For a twist, try a Brie with herbs or truffles for an upscale flavor that pairs well with the sweetness of the onions.

If you're looking for a lighter option, you can substitute Brie with Camembert or even a mild goat cheese. Both alternatives will provide a different yet delightful taste experience. Just remember that goat cheese has a tanginess that will contrast with the sweetness of the onions, giving the tart a unique twist.

Perfecting the Tart Crust

Pre-made pie crusts are a great convenience, but taking care during the baking process is key to achieving a flaky texture. Ensure that when you pre-bake the crust, it remains blind-baked (with pie weights or uncooked rice) for optimal results. This prevents the crust from becoming soggy once the filling is added. Bake just until it's lightly golden, about 10 minutes, to allow the crust to set before adding your egg and cream mixture.

After baking, let the shell cool for a few minutes before adding your toppings. This will help keep the cheese from melting too quickly, ensuring you retain the integrity of each layer in your tart. If you're making this tart ahead of time, consider freezing the assembled but unbaked tart for up to a month. Just be sure to cover it well and add an extra 10-15 minutes to the baking time when cooking from frozen.

Ingredients

Gather these fresh ingredients for an unforgettable flavor experience.

Ingredients

  • 1 pre-made pie crust
  • 3 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 teaspoon salt
  • 1 teaspoon sugar
  • 1 cup Brie cheese, rind removed and cut into slices
  • 2 eggs
  • 1/2 cup heavy cream
  • 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried thyme)
  • Black pepper to taste

Make sure to have everything ready before you start to enjoy the process!

Instructions

Follow these easy steps to create your delicious tart.

Preheat the Oven

Preheat your oven to 375°F (190°C).

Caramelize the Onions

In a large pan, heat the olive oil over medium heat. Add sliced onions, salt, and sugar. Cook gently, stirring frequently, for about 20 minutes or until onions are golden brown.

Prepare the Tart Shell

Roll out the pie crust and place it in a tart pan. Poke holes in the bottom with a fork and pre-bake for 10 minutes.

Combine Egg and Cream

In a bowl, whisk together the eggs, heavy cream, thyme, and a pinch of black pepper.

Assemble the Tart

Spread the caramelized onions evenly over the tart shell, then layer Brie slices on top. Finally, pour the egg mixture over everything.

Bake

Bake the tart in the preheated oven for about 25 minutes, or until the filling is set and the top is golden.

Serve

Let the tart cool for a few minutes before slicing. Serve warm or at room temperature.

Enjoy your delectable caramelized onion and Brie tart with your favorite beverage!

Secondary image

Pro Tips

  • To enhance the flavor, consider adding a touch of balsamic vinegar to the onions while caramelizing. It adds depth and complements the Brie well.

Storage and Reheating Tips

Leftover Savory Caramelized Onion and Brie Tart can be stored in an airtight container in the refrigerator for up to three days. To reheat, simply place individual slices in a toaster oven or preheated oven at 350°F (175°C) for about 10-15 minutes until warmed through. This method helps maintain the crispness of the crust while thoroughly heating the filling.

If you have a larger portion, you can reheat the whole tart but cover it loosely with foil to avoid over-browning. For even easier storage or to make ahead of time, this tart can also be frozen after baking. Wrap it tightly in plastic wrap followed by aluminum foil, and it will keep well for up to two months.

Serving Suggestions

This tart can serve as a stunning centerpiece for a brunch spread, paired with a crisp green salad or a selection of seasonal fruits. For an elegant appetizer, slice it into small wedges and serve with a light drizzle of balsamic glaze or a sprinkle of fresh herbs on top. I also love pairing it with a glass of chilled white wine, such as a Sauvignon Blanc, which balances the richness of the Brie.

You can also elevate the dish by incorporating additional toppings before baking, such as sautéed mushrooms or spinach, to add more depth and nutrition to your tart. Experimenting with different cheese combinations, such as including goat cheese or even a sharp cheddar, can also yield exciting flavor profiles.

Questions About Recipes

→ Can I make this tart ahead of time?

Yes, you can prepare the tart and bake it a day in advance. Just reheat it in the oven before serving.

→ What can I substitute for Brie cheese?

You could use Camembert or another soft cheese with a similar texture. Just ensure it has a rich flavor.

→ How do I store leftovers?

Store any leftover tart in an airtight container in the refrigerator for up to 3 days. Reheat in the oven for the best texture.

→ Can I use a different type of onion?

Absolutely! While yellow onions are traditional, red or sweet onions can also work well for a different flavor profile.

Savory Caramelized Onion and Brie Tart

I adore making this Savory Caramelized Onion and Brie Tart whenever I have guests over or simply want to treat myself. The blend of sweet caramelized onions and creamy Brie creates an irresistible flavor profile that’s perfect for any occasion. The buttery crust is easy to work with and adds a delightful crunch to each bite. I love how this dish can transition seamlessly from a cozy evening snack to an elegant appetizer, making it a versatile addition to my recipe collection.

Prep Time20 minutes
Cooking Duration30 minutes
Overall Time50 minutes

Created by: Mario

Recipe Type: Classic Bakery Favorites

Skill Level: Beginner

Final Quantity: 8 servings

What You'll Need

Ingredients

  1. 1 pre-made pie crust
  2. 3 large onions, thinly sliced
  3. 2 tablespoons olive oil
  4. 1 teaspoon salt
  5. 1 teaspoon sugar
  6. 1 cup Brie cheese, rind removed and cut into slices
  7. 2 eggs
  8. 1/2 cup heavy cream
  9. 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried thyme)
  10. Black pepper to taste

How-To Steps

Step 01

Preheat your oven to 375°F (190°C).

Step 02

In a large pan, heat the olive oil over medium heat. Add sliced onions, salt, and sugar. Cook gently, stirring frequently, for about 20 minutes or until onions are golden brown.

Step 03

Roll out the pie crust and place it in a tart pan. Poke holes in the bottom with a fork and pre-bake for 10 minutes.

Step 04

In a bowl, whisk together the eggs, heavy cream, thyme, and a pinch of black pepper.

Step 05

Spread the caramelized onions evenly over the tart shell, then layer Brie slices on top. Finally, pour the egg mixture over everything.

Step 06

Bake the tart in the preheated oven for about 25 minutes, or until the filling is set and the top is golden.

Step 07

Let the tart cool for a few minutes before slicing. Serve warm or at room temperature.

Extra Tips

  1. To enhance the flavor, consider adding a touch of balsamic vinegar to the onions while caramelizing. It adds depth and complements the Brie well.

Nutritional Breakdown (Per Serving)

  • Calories: 350 kcal
  • Total Fat: 24g
  • Saturated Fat: 13g
  • Cholesterol: 180mg
  • Sodium: 150mg
  • Total Carbohydrates: 23g
  • Dietary Fiber: 1g
  • Sugars: 5g
  • Protein: 7g