Caramelized Onion and Gruyère Stuffed Mushrooms Recipe
Introduction
These Caramelized Onion Gruyère Stuffed Mushrooms are a delicious appetizer perfect for any gathering. The sweet, deeply flavorful onions complement the nutty Gruyère cheese, all baked inside tender mushrooms for a bite-sized treat.
Ingredients
- 16 large mushrooms, stems removed
- 2 medium onions, thinly sliced
- 1 cup grated Gruyère cheese
- 2 tablespoons butter
Instructions
- Step 1: In a skillet over medium heat, melt the butter and add the sliced onions. Cook slowly, stirring occasionally, until the onions are soft, golden, and caramelized, about 25–30 minutes.
- Step 2: Preheat the oven to 375°F (190°C). Place the mushroom caps on a baking sheet. Spoon the caramelized onions evenly into each mushroom cap, then sprinkle the grated Gruyère cheese on top.
- Step 3: Bake in the preheated oven for 15–20 minutes, until the mushrooms are tender and the cheese is melted and bubbly. Serve warm.
Tips & Variations
- Use white or cremini mushrooms for a milder flavor, or portobello caps for a meatier bite.
- Add a pinch of thyme or rosemary to the caramelized onions for an herbal note.
- For a richer filling, mix in a tablespoon of cream cheese with the onions before stuffing.
Storage
Store leftover stuffed mushrooms in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven at 350°F (175°C) for about 10 minutes until warmed through.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I prepare the caramelized onions in advance?
Yes, caramelized onions can be made ahead and stored in the refrigerator for up to 3 days, making assembly quick on serving day.
Can I use other types of cheese instead of Gruyère?
Absolutely. Swiss, mozzarella, or fontina cheeses also melt well and provide delicious alternatives depending on your taste preference.
PrintCaramelized 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
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
