Caramelized Onion and Gruyère Stuffed Mushrooms Recipe
Introduction
Caramelized Onion Gruyère Stuffed Mushrooms are a savory appetizer perfect for any gathering. The sweet, tender onions combined with nutty Gruyère cheese create a rich filling inside tender baked mushrooms.
Ingredients
- 12 large mushrooms, stems removed
- 2 large onions, thinly sliced
- 1 cup shredded Gruyère cheese
- 2 tablespoons butter
Instructions
- Step 1: Heat butter in a skillet over medium heat. Add sliced onions and cook slowly, stirring occasionally, until they become soft and golden brown, about 25-30 minutes, to caramelize the onions.
- Step 2: Remove the skillet from heat and mix the caramelized onions with the shredded Gruyère cheese.
- Step 3: Preheat the oven to 375°F (190°C). Fill each mushroom cap with the onion and cheese mixture.
- Step 4: Arrange stuffed mushrooms on a baking sheet and bake for 15-20 minutes, or until the cheese is melted and bubbly.
- Step 5: Remove from oven and let cool slightly before serving.
Tips & Variations
- Use cremini mushrooms for a deeper flavor or button mushrooms for a milder taste.
- Add a sprinkle of fresh thyme or rosemary to the filling for extra aroma.
- For a vegetarian version, ensure the Gruyère cheese is made without animal rennet.
- Try adding a small amount of garlic while caramelizing onions for an extra layer of flavor.
Storage
Store leftover stuffed mushrooms in an airtight container in the refrigerator for up to 2 days. Reheat in the oven at 350°F (175°C) for 10 minutes to maintain their texture and flavor. Avoid microwaving as it can make the mushrooms soggy.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I prepare the caramelized onions ahead of time?
Yes, caramelized onions can be made up to 3 days in advance and stored in the refrigerator. This helps save time when assembling the stuffed mushrooms.
What type of mushrooms work best for stuffing?
Large mushrooms with a sturdy cap, such as cremini or portobello, hold the filling well and bake nicely, making them ideal for stuffed mushroom recipes.
PrintCaramelized Onion and Gruyère Stuffed Mushrooms Recipe
These Caramelized Onion Gruyère Stuffed Mushrooms are a savory appetizer featuring juicy mushrooms filled with sweet, slowly caramelized onions and topped with gooey melted Gruyère cheese. Perfectly baked until golden and bubbling, they make a delightful starter or party snack.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 60 minutes
- Yield: 20 stuffed mushrooms (serves 4–6 as appetizer) 1x
- Category: Appetizer
- Method: Baking
- Cuisine: French-inspired
- Diet: Vegetarian
Ingredients
Mushrooms
- 20 large white or cremini mushrooms, stems removed and reserved
Filling
- 2 large onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 cup grated Gruyère cheese
- Salt, to taste
- Freshly ground black pepper, to taste
Instructions
- Prepare the mushrooms: Preheat your oven to 375°F (190°C). Clean the mushrooms by wiping them with a damp cloth and carefully remove the stems, setting the caps aside for stuffing.
- Caramelize the onions: In a large skillet, melt the butter over medium heat. Add the thinly sliced onions and a pinch of salt. Cook slowly, stirring occasionally, for about 25-30 minutes until the onions are deeply golden brown and sweetly caramelized. Season with pepper.
- Make the filling: Chop the reserved mushroom stems finely and add them to the caramelized onions. Stir to combine and cook for an additional 2-3 minutes until the stems soften. Remove from heat and let cool slightly. Mix in half of the grated Gruyère cheese.
- Stuff the mushrooms: Using a spoon, fill each mushroom cap generously with the onion and Gruyère mixture. Sprinkle the remaining Gruyère cheese evenly on top of each stuffed mushroom.
- Bake the stuffed mushrooms: Arrange the stuffed mushrooms on a baking sheet lined with parchment paper. Bake in the preheated oven for 15-18 minutes or until the cheese has melted and turned golden brown.
- Serve: Remove from the oven and allow to cool for a few minutes before serving warm as a delicious appetizer or side.
Notes
- Choose firm mushrooms with a rounded cap for easy stuffing.
- For extra flavor, add minced garlic or fresh thyme to the caramelized onions.
- This recipe can be prepared ahead; assemble the mushrooms and refrigerate before baking.
- Gruyère cheese can be substituted with Emmental or mozzarella if desired.
- Serve with fresh herbs for added color and freshness.
Keywords: stuffed mushrooms, caramelized onions, Gruyère, appetizer, baked mushrooms, easy party snacks
