Description
This Upside Down Onion Tart with Brie is a savory and elegant dish featuring sweet caramelized onions paired with creamy, melty Brie cheese in a flaky, golden puff pastry crust. Perfect for gatherings or a cozy meal, it offers a beautiful presentation and rich, layered flavors that delight the palate.
Ingredients
Scale
Main Ingredients
- 3 large yellow or sweet onions, thinly sliced
- 8 oz (225g) creamy ripe Brie cheese, sliced
- 1 sheet pre-made puff pastry (about 8x8 inch or enough to cover tart pan)
- 2 tablespoons butter
- 1 teaspoon fresh thyme leaves, plus extra for garnish
- Salt, to taste
- Freshly ground black pepper, to taste
- 1 tablespoon olive oil (optional, for sautéing onions)
Instructions
- Caramelize the Onions: Thinly slice the onions and slowly cook them over low heat with butter and optional olive oil until they turn soft, golden-brown, and rich in flavor. This process takes about 30 to 40 minutes. Stir occasionally to avoid burning and develop deep sweetness.
- Prepare the Puff Pastry: While the onions caramelize, thaw your puff pastry if frozen. Roll it out to fit your tart pan and trim the edges to create a neat base that holds the filling perfectly.
- Layer the Tart: Press the caramelized onions evenly into the bottom of your tart pan. Then slice the Brie and arrange it over the onions, covering as much surface as you prefer for a cheesy, indulgent bite.
- Cover and Bake: Place the puff pastry sheet over the Brie and onions, tucking the edges inside the pan to encase the filling. Bake in a preheated oven at 375°F (190°C) for 25 to 30 minutes, until the pastry is golden and puffed.
- Flip and Serve: Allow the tart to cool for a few minutes, then carefully invert it onto a serving plate. The caramelized onions and melted Brie will be beautifully displayed on top. Garnish with fresh thyme leaves before serving.
Notes
- Slowly caramelize onions for the best deep, rich flavor without burning.
- Use a non-stick or well-buttered tart pan to easily flip the tart and keep its perfect presentation.
- Keep filling layers balanced to avoid sogginess and ensure the crust stays crisp.
- Let the tart cool slightly before flipping to help it hold together better.
- Choose a soft, creamy Brie for optimal melting and flavor balance.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Appetizers
- Method: Baking
- Cuisine: French-inspired
Nutrition
- Serving Size: 1 slice (1/6 of tart)
- Calories: 320 kcal
- Sugar: 8 g
- Sodium: 250 mg
- Fat: 22 g
- Saturated Fat: 12 g
- Unsaturated Fat: 8 g
- Trans Fat: 0 g
- Carbohydrates: 20 g
- Fiber: 2 g
- Protein: 6 g
- Cholesterol: 45 mg
Keywords: onion tart, upside down tart, brie cheese, caramelized onions, puff pastry, appetizer, vegetarian, savory tart
