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French Onion Tarte Tatin Recipe

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4.1 from 66 reviews

French Onion Tarte Tatin is a savory variation of the classic French caramelized apple dessert, featuring sweet and deeply caramelized onions cooked with thyme and deglazed with white wine and balsamic vinegar, all encased in a buttery, flaky puff pastry crust. This impressive and flavorful dish combines sweet, savory, and herby notes, perfect as an elegant appetizer or a special dinner centerpiece.

Ingredients

Onion Mixture

  • 3 large onions, thinly sliced
  • 2 tbsp olive oil
  • 1 tbsp unsalted butter
  • 1 tbsp brown sugar
  • 2 tsp fresh thyme leaves (or 1 tsp dried thyme)
  • 1/2 cup white wine (or vegetable broth for a non-alcoholic version)
  • 1 tbsp balsamic vinegar
  • 1 tbsp water (for deglazing)
  • Salt and pepper, to taste

Puff Pastry

  • 1 sheet puff pastry (store-bought or homemade)

Garnish

  • Fresh thyme sprigs (for garnish, optional)

Instructions

  1. Preheat Oven: Preheat your oven to 375°F (190°C) to ensure it reaches the proper temperature for baking the tart later.
  2. Caramelize Onions: In a large, oven-safe skillet, heat the olive oil and butter over medium heat. Add the thinly sliced onions and cook them, stirring occasionally, for about 20 minutes until they soften and start to become golden and caramelized.
  3. Add Sugar and Thyme: Stir in the brown sugar and thyme leaves, mixing well with the onions. Continue cooking for an additional 5 to 10 minutes until the onions are richly caramelized and have a deep golden-brown color.
  4. Deglaze the Pan: Pour in the white wine and balsamic vinegar while scraping the bottom of the skillet to loosen any browned bits. Add the water if needed. Let the mixture simmer and reduce by about half, allowing the onions to become tender and coated with a glossy sauce. Season with salt and pepper according to taste.
  5. Prepare Puff Pastry: On a lightly floured surface, roll out the puff pastry sheet and cut it into a circle slightly larger than the skillet to allow for tucking the edges.
  6. Assemble the Tart: Carefully place the puff pastry sheet over the caramelized onions in the skillet. Gently tuck the edges of the pastry down around the onions inside the skillet to enclose them.
  7. Bake: Transfer the skillet to the preheated oven and bake for 25 to 30 minutes or until the puff pastry is golden brown, puffed, and fully cooked.
  8. Invert and Serve: Remove the skillet from the oven and let it cool for a few minutes to set. Then carefully invert the skillet onto a large serving plate, so the onions are on top. Garnish with fresh thyme sprigs if desired. Serve warm for best flavor.

Notes

  • For added tang, splash in some sherry or white wine vinegar while deglazing the onions.
  • This Tarte Tatin is best enjoyed warm alongside a light green salad or as an elegant appetizer.
  • To make it richer, sprinkle grated Gruyère cheese over the onions before placing the puff pastry on top and baking.

Find it online: https://flavorspath.com/french-onion-tarte-tatin-recipe/