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Caramelized Onion Puff Pastry Tarts

These Caramelized Onion Puff Pastry Tarts are made with flaky pastry, topped with caramelized onion and brie cheese. Your new go-to appetizer for the upcoming holiday season!

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For the puff pastry:
  • 2 cups All-purpose flour
  • 1 1/2 cup Cold butter, cubed
  • 1/2 - 2/3 cup Iced cold water
  • 1/2 tsp Salt
For the filling:
  • 1 tbsp Avocado oil
  • 3 Medium onions, sliced
  • 2 tbsp Domino® Light Brown Sugar
  • 1 tbsp Balsamic vinegar
  • 1 tbsp Fresh thyme
  • 1/2 tsp Salt
  • 1/4 tsp Pepper
  • 4 oz Brie cheese, diced
  • 1 Egg, beaten (optional)
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Prep Time: 15 minutes / Cook Time: 40 minutes / Yields: 9 Pastries

Prepare the puff pastry

Step 1

In a food processor, place flour, cubed butter and salt. Pulse about 10 times. Add 1/2 cup water and pulse until the dough forms into a ball.
Add more water if needed.

Step 2

Transfer to a floured surface and knead a few times. Using a lightly floured rolling pin roll the dough into a 10x15-inch rectangle. Fold the dough three times in half, wrap with a plastic wrap and refrigerate for at least one hour. The pastry should be cold but easy to work with.

Prepare the filling

Step 3

Heat oil in a large pan over medium heat. Add onions and cook for about 8 minutes until starting to brown. Stir in Domino® Light Brown Sugar, balsamic vinegar, thyme, and salt. Cook for additional 15 minutes or until caramelized. Season with black pepper. Let cool to room temperature.

Assemble the pastries

Step 4

Meanwhile, preheat oven to 400 degrees Fahrenheit. Make an egg wash by whisking an egg in a small bowl.

Step 5

Roll puff pastry into a 10x15-inch rectangle on a floured surface. Cut into 9 squares. Place each piece onto a baking sheet lined with parchment paper about 2 inches apart. Top each piece with caramelized onions and diced brie. Brush the edges with egg wash. Bake for 15-20 minutes until the cheese has melted and pastry is golden brown.

Additional Tips
  • To save time, you can use a pre-made thawed puff pastry. Puff pastry needs to be kept cold for the best results, make sure to work quickly!
  • The egg wash makes the tarts more golden once cooked. You can omit it if needed.
  • Tarts can be reheated at 350 degrees Fahrenheit for about 8-10 minutes.
  • The recipe is perfect for parties and can be double or tripled to feed the crowd!
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