Caramelized Onion Goat Cheese Tarts (Printable)

Buttery pastry shells filled with sweet caramelized onions and tangy goat cheese for an elegant starter

# What you'll need:

→ Pastry Base

01 - 1 sheet puff pastry (approximately 8.75 oz), thawed if frozen

→ Caramelized Onions

02 - 3 large yellow onions, thinly sliced
03 - 2 tablespoons unsalted butter
04 - 1 tablespoon olive oil
05 - 1/2 teaspoon salt
06 - 1/4 teaspoon freshly ground black pepper
07 - 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
08 - 1 teaspoon granulated sugar

→ Cheese and Garnish

09 - 5 oz goat cheese, crumbled (approximately 150 g)
10 - 1 large egg, beaten for egg wash
11 - 1 tablespoon fresh chives or parsley, finely chopped (optional)

# Directions:

01 - Preheat oven to 400°F. Line a baking sheet with parchment paper to prevent sticking and ensure easy cleanup.
02 - Heat butter and olive oil in a large skillet over medium-low heat. Add sliced onions, salt, and sugar. Cook uncovered, stirring frequently to prevent burning, for 25-30 minutes until onions turn deep golden brown and develop a sweet, jam-like consistency. Add fresh thyme and black pepper during the final 5 minutes of cooking to infuse flavors.
03 - While onions caramelize, unroll thawed puff pastry on a lightly floured surface. Cut into 6 equal rectangles approximately 4x6 inches each. Transfer rectangles to the prepared baking sheet. Using a sharp knife, carefully score a 1/2-inch border around the perimeter of each rectangle, taking care not to cut completely through the dough.
04 - Brush the scored borders of each pastry rectangle with beaten egg using a pastry brush. This will create a golden, shiny finish during baking and help the pastry rise evenly.
05 - Divide the caramelized onions evenly among the pastry rectangles, spreading them within the scored borders. Top each tart generously with crumbled goat cheese, ensuring an even distribution across all portions.
06 - Place baking sheet in preheated oven and bake for 15-18 minutes. The pastry should puff up beautifully and turn golden brown, while the cheese softens slightly. Rotate the baking sheet halfway through baking if necessary for even browning.
07 - Remove tarts from oven and let cool for 2-3 minutes on the baking sheet. Garnish with finely chopped fresh chives or parsley if desired. Serve warm for optimal flavor, or allow to cool to room temperature for serving as an elegant appetizer.

# Expert Suggestions:

01 -
  • The slow caramelized onions develop a natural sweetness that balances perfectly with tangy goat cheese
  • These tarts look impressive but take less than an hour from start to finish
  • They serve equally well as dinner party appetizers or casual snacks with wine
02 -
  • Low and slow is the secret to properly caramelized onions without burning them
  • Scoring the pastry border creates that beautiful raised edge but don't cut all the way through
  • Room temperature goat cheese is easier to crumble evenly over the tarts
03 -
  • Pat the sliced onions dry before cooking if they seem especially moist
  • Don't rush the caramelization process the deep flavor develops over time

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