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This Baked Brie, topped with balsamic caramelized onions and wrapped in a puff pastry crust, is a rich and elegant appetizer.

The golden puff pastry crust holds everything together so that when you cut into this baked brie, melted cheese flows out. This is a sweet and savory elegant appetizer recipe and tastes fantastic with sliced apples.

caramelized onion baked brie puff pastry

Why this recipe works:

Whether you’re entertaining for a crowd or are just looking for a tasty appetizer recipe to share with your family, this baked brie is amazing!

  • The balsamic caramelized onions are very easy to make and add an incredible amount of flavor to the brie.
  • Because the brie is wrapped in puff pastry, this appetizer is fantastic served alone or with sliced apples.
  • Because this baked brie is so rich, only a small amount is needed to satisfy!
  • The result is a flaky crust, melted cheese, and savory onion flavor.

Ingredients needed:

  • Thinly sliced yellow onions, that get sautéed in butter, salt, and pepper. These then caramelized in balsamic vinegar and a bit of sugar.
  • You’ll use an entire wheel of brie cheese. This gets wrapped in a sheet of puff pastry, topped with those caramelized onions and fresh thyme, and coated with an egg wash for a beautiful golden brown color.
ingredients needed to bake brie wrapped in puff pastry with caramelized onions

How to make this Caramelized Onion Baked Brie en Croûte:

  1. First step is to sauté the onions in melted butter of medium high heat.
  2. Once they have browned, you’ll add the sugar and balsamic vinegar.
  3. This mixture cooks for a few more minutes to burn off any liquid and caramelize the onions.
  4. Once the onions cool, you’ll place them on top of the brie with the fresh thyme.
  5. The puff pastry gets wrapped around the brie.
  6. Egg is brushed on top to create a golden brown color. You’ll cook the puff pastry baked brie in the oven for about 40 minutes.

Cooking tips for perfect results:

  • I highly recommend slicing the onions with a mandolin. This will quickly give you thin and uniformly cut slices.
  • You can eat the wax! A lot of people might question whether you have to remove the wax prior to cooking the baked brie. It is, in fact, completely edible.
  • Be sure to seal the puff pastry the best you can. Even if you do, the cheese might melt out while you cook it. Not to worry! You can easily scrape it back up and serve it with the rest of the baked brie.
apple slice with warm baked brie

Looking for other delicious and elegant appetizer recipes? Be sure to try these favorites:

If you’ve made this or any other recipe on my site, let me know in the comment section how it turned out. I love hearing from my readers!

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Puff Pastry Wrapped Baked Brie with Caramelized Onions

Prep15 minutes
Cook1 hour
Total1 hour 15 minutes
Servings 12 servings
This Baked Brie, topped with balsamic caramelized onions and wrapped in a puff pastry crust, is a rich and elegant appetizer.


  • 4 tablespoons butter
  • 2 medium yellow onions sliced thin
  • 1 teaspoon kosher salt
  • 1/2 teaspoon pepper freshly ground
  • 1 teaspoon granulated sugar
  • 2 tablespoons balsamic vinegar
  • 1 teaspoon fresh thyme
  • 13.4 ounce brie wheel size can vary but this is what I found at Costco
  • 9 ounce puff pastry I used one sheet from a Trader Joe's Puff Pastry package
  • 1 egg slightly beaten


  • Melt butter in large sauté pan over medium high heat. Add onion slices with salt and pepper, toss to coat in melted butter, and then stir occasionally only to prevent burning.
    sliced onions in pan
  • Cook until the onions turn a deep golden brown and have caramelized. This can take 15-25 minutes. Once caramelized, add the sugar and balsamic vinegar.
    adding balsamic vinegar to sautéed onions
  • Stir to combine and cook for several more minutes until all of the moisture has evaporated. Set aside and allow to cool.
    balsamic caramelized onions
  • Unfold puff pastry sheet and set out on large cutting board. Roll the puff pastry to a large enough square so that it can fully wrap around the brie, onions, and fresh thyme. Set the brie wheel on the center of the puff pastry and top with the caramelized onions.
    brie wheel topped with caramelized onions
  • Pull the corners up on the puff pastry so that they meet in the middle and crimp together to form a tight seal. If there are any openings, the brie will spill out when you bake it.
    brie wheel wrapped in puff pastry
  • Use a pastry brush to cover the puff pastry. This will give you a rich golden brown color as it cooks. You need not use all of the egg.
    egg wash on puff pastry
  • Carefully transfer the covered brie to a baking sheet lined with parchment paper or a silicon mat. Bake in a preheated 400° F oven for 30-40 minutes or until it is golden brown. Serve warm with sliced apples.


Calories: 273kcal, Carbohydrates: 12g, Protein: 9g, Fat: 21g, Saturated Fat: 10g, Cholesterol: 55mg, Sodium: 486mg, Potassium: 96mg, Fiber: 1g, Sugar: 2g, Vitamin A: 332IU, Vitamin C: 2mg, Calcium: 68mg, Iron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Did you make this? Leave me a comment below

Hi! I’m Krissy.

I love to create the BEST versions of your favorite recipes. If you love to cook, love to eat, or just have a deep appreciation for good food, you’re in the right place! Stick around… I have hundreds of recipes for you to make.

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