Description
Delight in these Caramelized Onion Gruyère Stuffed Mushrooms, a savory French-inspired appetizer perfect for parties and cozy gatherings. Large white or cremini mushrooms are filled with a luscious mixture of sweetly caramelized onions, melted Gruyère cheese, cream cheese, and crispy panko breadcrumbs, then baked to golden perfection. Garnished with fresh parsley, these bites combine rich flavors and satisfying textures in every mouthful.
Ingredients
Scale
Mushrooms
- 20 large white or cremini mushrooms, stems removed and cleaned
Caramelized Onion Mixture
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1 large yellow onion, thinly sliced
- 2 cloves garlic, minced
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 teaspoon fresh thyme leaves (or 1/4 teaspoon dried thyme)
Cheese Filling
- 1/2 cup grated Gruyère cheese
- 1/4 cup cream cheese, softened
- 1/4 cup panko breadcrumbs
Garnish
- Chopped fresh parsley (optional)
Instructions
- Preheat Oven and Prepare Baking Sheet: Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper to prevent sticking and ease cleanup.
- Caramelize Onions: Heat the butter and olive oil in a skillet over medium-low heat. Add the thinly sliced onions and cook, stirring occasionally, for 20 to 25 minutes until the onions turn a deep golden brown and develop a rich sweetness.
- Add Garlic and Seasonings: Stir in the minced garlic, salt, black pepper, and thyme leaves, and cook for an additional minute to release their aromas. Remove the skillet from the heat and allow the mixture to cool slightly.
- Prepare Stuffing Mixture: In a mixing bowl, combine the caramelized onion mixture with grated Gruyère cheese, softened cream cheese, and panko breadcrumbs. Mix thoroughly until well incorporated to form a creamy and slightly textured filling.
- Stuff Mushrooms: Spoon the cheese and onion filling into each mushroom cap, filling them generously. Arrange the stuffed mushrooms on the prepared baking sheet with the filled side facing up.
- Bake: Place the baking sheet in the preheated oven and bake for 18 to 20 minutes, or until the mushrooms are tender and the tops of the stuffing turn a golden brown and slightly crisp.
- Garnish and Serve: Remove the stuffed mushrooms from the oven, sprinkle with chopped fresh parsley if desired, and serve warm as a delightful appetizer or party bite.
Notes
- For a heartier texture, substitute white or cremini mushrooms with baby portobello mushrooms.
- These stuffed mushrooms can be prepared ahead of time and baked just before serving for convenience.
- For added flavor depth, add a splash of balsamic vinegar to the onions during caramelization.
