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Caramelized Onion and Blue Cheese Puff Pastry Bites

These flaky puff pastry bites are filled with sweet caramelized onions, tangy blue cheese, and savory bacon, making a perfect appetizer for any gathering.
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Prep Time 30 minutes
Cook Time 35 minutes
Total Time 1 hour 5 minutes
Servings: 12 pieces
Course: Appetizer, Snack
Cuisine: American
Calories: 180
Ingredients Method Notes

Ingredients
  

For the filling
  • 4-5 medium sweet onions, sliced
  • 1 tablespoon butter
  • 1 tablespoon olive oil
  • 1 tablespoon balsamic vinegar
  • 3/4 cup sour cream Can be swapped for Greek yogurt for a healthier option.
  • 1/2 cup blue cheese crumbles
  • 5 slices thick-cut bacon, cut into 1-inch squares, cooked Use turkey bacon for a healthier version.
  • to taste Salt and pepper
For the pastry
  • 1 sheet frozen puff pastry, thawed Use half of a 17.3-ounce package.

Method
 

Caramelize the Onions
  1. In a large sauté pan, heat the butter and olive oil over medium-high heat.
  2. Add the sliced onions and a generous pinch of salt.
  3. Cook, stirring occasionally, for 25-35 minutes, until the onions are caramelized and softened.
  4. Stir in the balsamic vinegar and continue to cook for another 2-3 minutes, then set aside.
Prepare the Pastry
  1. Preheat the oven to 400°F and position the rack in the upper third of the oven.
  2. On a lightly floured surface, roll the puff pastry into a 14×10-inch rectangle.
  3. Fold 1/2 to 1 inch of the edges inward on all four sides to create a border.
  4. Transfer the pastry to a large baking sheet.
Make the Topping
  1. In a small bowl, mix the sour cream and blue cheese together, adding salt and pepper to taste.
  2. Spread this mixture evenly over the center of the puff pastry, leaving the borders free.
Assemble the Tart
  1. Evenly distribute the caramelized onions over the sour cream and blue cheese mixture.
  2. Top with the cooked bacon pieces.
Bake the Pastry
  1. Bake in the preheated oven for 25-35 minutes, or until the pastry is golden brown and the toppings are bubbly.
Serve
  1. Remove from the oven and let cool slightly. Slice into 12 pieces and serve warm.

Notes

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in a 350°F oven for 8–10 minutes. To freeze, wrap each piece in plastic wrap and place in a freezer bag, freeze up to 1 month, and reheat from frozen in a 350°F oven for 12–15 minutes.