Caramelized Onion and Gruyère Stuffed Mushrooms Recipe
These Caramelized Onion Gruyère Stuffed Mushrooms are a savory appetizer featuring earthy mushrooms filled with sweet, caramelized onions and melted Gruyère cheese. Baked to perfection, they offer a delightful combination of rich flavors and gooey textures that are perfect for entertaining or a tasty snack.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 60 minutes
- Yield: 16 stuffed mushrooms (4-6 servings) 1x
- Category: Appetizer
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Ingredients
Scale
Mushrooms
- 16 large white button mushrooms, stems removed
Caramelized Onions
- 2 large yellow onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 teaspoon olive oil
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
Cheese
- 1 cup grated Gruyère cheese
Instructions
- Prepare the Mushrooms: Clean the mushrooms by wiping them with a damp cloth and remove the stems carefully to create space for the filling. Set aside.
- Caramelize the Onions: In a large skillet, heat the butter and olive oil over medium-low heat. Add the thinly sliced onions, salt, and pepper. Cook slowly for about 25-30 minutes, stirring occasionally, until the onions are golden brown and caramelized.
- Stuff the Mushrooms: Preheat the oven to 375°F (190°C). Spoon the caramelized onions into each mushroom cap, then top generously with grated Gruyère cheese.
- Bake: Arrange the stuffed mushrooms on a baking sheet lined with parchment paper or a greased pan. Bake in the preheated oven for 15-20 minutes, or until the mushrooms are tender and the cheese is melted and bubbly with a slight golden crust.
- Serve: Remove from the oven and let cool slightly before serving. Enjoy warm as an appetizer or side dish.
Notes
- You can substitute Gruyère with other melting cheeses such as mozzarella or fontina if desired.
- For a richer flavor, add a splash of white wine while caramelizing the onions.
- Ensure mushrooms are dry before stuffing to prevent sogginess.
- Use a baking dish that holds the mushrooms snugly to prevent tipping over during baking.
Keywords: caramelized onion, gruyère, stuffed mushrooms, baked appetizer, vegetarian snack
