Blue Cheese and Caramelized Onion Squares
Elevate your appetizer game with these irresistible Blue Cheese and Caramelized Onion Squares, a sophisticated treat perfect for entertaining or indulging yourself. Featuring a buttery puff pastry base topped with luscious caramelized onions, tangy blue cheese crumbles, and a hint of fresh thyme, each bite is a delightful harmony of bold flavors and textures. The onions are cooked to golden perfection with a touch of balsamic vinegar, adding a sweet and savory depth that pairs beautifully with the creamy pungency of the cheese. Quick to prepare with just 15 minutes of hands-on time, these elegant squares bake to golden, flaky perfection in under 20 minutes. Serve them warm or at room temperature as a crowd-pleasing appetizer, a snack, or even a centerpiece for a chic cocktail party.
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Recipe Information
Ingredients
- 1 sheet puff pastry sheet
- 2 tablespoons unsalted butter
- 2 medium yellow onions
- 1 teaspoon granulated sugar
- 1 tablespoon balsamic vinegar
- 3 ounces blue cheese crumbles
- 1 teaspoon fresh thyme leaves
- 1 large egg
- 1 tablespoon water
Instructions
Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
Thaw the puff pastry sheet as directed on the package if it was frozen. Roll it out slightly on a floured surface to ensure an even thickness.
Using a sharp knife or a pizza cutter, divide the puff pastry into 12 squares and place them evenly spaced on the prepared baking sheet.
Peel the onions and slice them thinly into half-moons.
In a large skillet, melt the butter over medium heat. Add the sliced onions and cook for 15-20 minutes, stirring occasionally, until they are soft and golden brown.
Sprinkle the sugar over the onions and stir well. Cook for an additional 2 minutes to help the onions caramelize further.
Add the balsamic vinegar to the skillet, stir, and cook for another 1-2 minutes until the mixture is thickened. Remove from heat and set aside to cool slightly.
In a small bowl, whisk together the egg and water to create an egg wash.
Brush the edges of each puff pastry square with the egg wash to promote a golden finish during baking.
Spoon a small amount of the caramelized onion mixture onto the center of each square, spreading it slightly but leaving the edges uncovered.
Sprinkle the blue cheese crumbles evenly over the onions and garnish with a pinch of fresh thyme leaves on each square.
Bake in the preheated oven for 15-18 minutes or until the puff pastry is golden and puffed.
Allow the squares to cool for 5 minutes on the baking sheet before transferring them to a serving platter. Serve warm or at room temperature.
Nutrition Facts
Calories |
2240 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 158.9 g | 204% | |
| Saturated Fat | 56.9 g | 284% | |
| Polyunsaturated Fat | 2.0 g | ||
| Cholesterol | 342 mg | 114% | |
| Sodium | 2496 mg | 109% | |
| Total Carbohydrate | 156.8 g | 57% | |
| Dietary Fiber | 9.6 g | 34% | |
| Total Sugars | 23.5 g | ||
| Protein | 46.5 g | 93% | |
| Vitamin D | 1.6 mcg | 8% | |
| Calcium | 562 mg | 43% | |
| Iron | 8.7 mg | 48% | |
| Potassium | 916 mg | 19% | |
*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
