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Gruyere Mushroom Caramelized Onion Bites Recipe


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3.9 from 31 reviews

  • Author: Jane
  • Total Time: 40 mins
  • Yield: 24 bites
  • Diet: Vegetarian

Description

Elegant bite-sized pastry cups filled with caramelized onions, sautéed mushrooms, and melty Gruyere cheese — a perfect holiday appetizer to impress your guests with rich, savory flavors and flaky puff pastry.


Ingredients

Pastry

  • 1 sheet puff pastry

Filling

  • 1 cup mushrooms, finely chopped
  • 1 onion, thinly sliced
  • 1 tbsp butter
  • 1 tbsp olive oil
  • 1 tsp thyme
  • Salt & pepper, to taste
  • 1 cup shredded Gruyere cheese


Instructions

  1. Preheat Oven: Set your oven to 375°F (190°C) to ensure it reaches the right temperature while you prepare the filling.
  2. Caramelize Onions: Heat olive oil and butter in a skillet over medium heat. Add the thinly sliced onions and cook gently, stirring frequently, for 15–20 minutes until they turn soft, sweet, and golden brown.
  3. Sauté Mushrooms: Add the finely chopped mushrooms along with thyme, salt, and pepper to the caramelized onions. Continue cooking until the mushrooms are tender and any moisture has evaporated, about 5–7 minutes.
  4. Prepare Puff Pastry: Cut the sheet of puff pastry into small squares, roughly 2×2 inches, and gently press each square into a mini muffin pan cup to form little pastry shells.
  5. Fill Pastry Cups: Spoon the mushroom and onion mixture evenly into each puff pastry shell, then top each with a generous amount of shredded Gruyere cheese.
  6. Bake: Place the mini muffin pan in the preheated oven and bake for 12–15 minutes, or until the pastry is puffed, golden, and the cheese is melted and bubbly.

Notes

  • For a shortcut, use mini phyllo cups instead of making your own from puff pastry.
  • These bites can be prepared ahead of time and baked just before serving to save time during your event.
  • Prep Time: 15 mins
  • Cook Time: 25 mins
  • Category: Appetizer
  • Method: Baking, Stovetop
  • Cuisine: French-Inspired