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Caramelized Onion Tart 🧅🥧

This savory tart is autumn elegance on a plate, and honestly, it's so much easier than it looks! The sweet caramelized onions paired with creamy goat cheese create the perfect cozy dinner that'll have your family asking for seconds. Plus, it's fancy enough to serve when you have guests over but simple enough for a Tuesday night.
Print Recipe
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings: 8 servings
Ingredients Method

Ingredients
  

  • 1 sheet frozen puff pastry thawed
  • 3 large yellow onions thinly sliced
  • 2 tablespoons butter
  • 2 tablespoons olive oil
  • 1 tablespoon fresh thyme leaves plus extra for garnish
  • 4 ounces goat cheese crumbled
  • 1/2 cup shredded Gruyère cheese
  • 2 tablespoons balsamic vinegar
  • 1 teaspoon sugar
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 egg beaten (for egg wash)

Method
 

  1. Preheat your oven to 400°F and line a baking sheet with parchment paper.
  2. In a large skillet over medium-low heat, melt the butter with olive oil. Add the sliced onions and cook, stirring occasionally, for about 30-35 minutes until they're golden brown and caramelized. (Don't rush this step, mama – it's where all the magic happens!)
  3. Stir in the balsamic vinegar, sugar, thyme, salt, and pepper, cooking for another 2-3 minutes. Remove from heat and let cool slightly.
  4. Roll out the puff pastry on your prepared baking sheet and score a 1-inch border around the edges with a knife (don't cut all the way through).
  5. Brush the border with the beaten egg to get that gorgeous golden finish.
  6. Spread the caramelized onions evenly over the pastry, staying within the border you created.
  7. Sprinkle both cheeses over the onions, distributing them evenly.
  8. Bake for 20-25 minutes until the pastry is puffed and golden brown around the edges.
  9. Let the tart cool for 5 minutes, then garnish with fresh thyme leaves and slice into squares.
  10. Serve warm with a simple arugula salad on the side for the perfect fall dinner!