Stuffed mushrooms are one of those appetizers that disappear fast. These are simple but packed with flavor – the mushroom stems get sautéed with shallots and garlic, then mixed with fresh herbs, nutty Gruyère, and panko breadcrumbs. The filling goes back into the mushroom caps, gets topped with more cheese, and bakes until everything is hot and melty. A quick broil at the end makes the tops golden and crispy.

The key is cooking the mushroom stems properly. You want all the moisture gone so the filling isn’t watery. Sauté them until they’re browned and concentrated, then mix them with the other ingredients. The Gruyère melts into everything and binds the filling together – no cream cheese needed. These are rich but not heavy, savory without being overwhelming, and they look impressive on a plate.

Chef Griffin

Gruyère Stuffed Mushrooms · Baked and Broiled

Gruyère Stuffed Mushrooms recipe – cremini caps filled with sautéed stems, shallots, garlic, herbs, and nutty Gruyère. Baked and broiled until golden.

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Ingredients Method Notes

Ingredients

20 medium cremini mushrooms – stems removed and reserved
3 tablespoons butter – divided
2 medium shallots – minced about 1/4 cup
2 cloves garlic – minced
1 tablespoon fresh thyme leaves – chopped
2 tablespoons fresh parsley – chopped plus more for garnish
1/2 cup panko breadcrumbs
1 cup shredded Gruyère cheese – divided 3/4 cup for filling, 1/4 cup for topping
Salt and freshly ground black pepper
Olive oil – for brushing the mushroom caps

Method

Prep the Mushrooms

Preheat your oven to 375°F (190°C). Line a large baking sheet with parchment paper or a silicone mat.
Clean the mushrooms by wiping them with a damp paper towel – don’t rinse them under water or they’ll absorb moisture and get soggy. Remove the stems by gently twisting them out. Set the caps aside. Chop the stems finely – you want small pieces that will cook quickly and evenly.
Brush the outside of each mushroom cap lightly with olive oil. This helps them brown and prevents them from drying out in the oven. Arrange the caps gill-side up on the prepared baking sheet.

Make the Filling

Heat 2 tablespoons of butter in a large skillet over medium heat. Once the butter is melted and foaming, add the chopped mushroom stems. Cook, stirring occasionally, until all the moisture has evaporated and the stems are starting to brown – this takes about 5-7 minutes. You want them dry and concentrated, not wet and steaming. If there’s liquid pooling in the pan, keep cooking until it’s gone.
Add the minced shallots to the pan and cook for 2-3 minutes until softened and fragrant. Add the garlic and cook for another minute until you can smell it. The garlic should be fragrant but not browned.
Remove the pan from the heat. Stir in the fresh thyme, parsley, and the remaining tablespoon of butter. Let the butter melt and coat everything. Add the panko breadcrumbs and stir to combine. The breadcrumbs will absorb the butter and any remaining moisture.
Add 3/4 cup of the shredded Gruyère and stir until it’s evenly distributed. Season generously with salt and pepper. Taste the filling – it should be well-seasoned and flavorful. The filling will be slightly loose but should hold together when you press it.

Stuff the Mushrooms

Using a spoon, fill each mushroom cap with the filling. Pack it in firmly – you want a generous mound in each cap. Don’t be shy – these mushrooms shrink as they cook, so a full stuffing now will look right when they’re done.
Once all the caps are stuffed, sprinkle the remaining 1/4 cup of Gruyère evenly over the tops.

Bake and Broil

Bake the stuffed mushrooms at 375°F for 20-25 minutes, until the mushroom caps are tender and the filling is hot. The mushrooms will release some liquid as they cook – that’s normal.
After 20-25 minutes, turn on your broiler to high. Move the baking sheet to the top rack (about 6 inches from the broiler) and broil for 2-3 minutes, watching closely. You want the tops golden brown and the cheese melted and bubbly. The panko should be crispy and the cheese should have some darker spots.

Serve

Remove from the oven and let the mushrooms cool for 2-3 minutes. They’ll be very hot inside. Transfer to a serving platter, garnish with a sprinkle of fresh chopped parsley, and serve warm.

Notes

Cooking the mushroom stems until all the moisture is gone is critical. Raw mushrooms are about 90% water. If you don’t cook that water out, your filling will be watery and the mushrooms will release liquid as they bake, making everything soggy. Sautéing the stems until they’re dry and starting to brown concentrates their flavor and removes the moisture problem.

The Gruyère does double duty. Mixed into the filling, it melts and binds everything together while adding nutty, savory flavor. Sprinkled on top, it creates a golden, melty cap that looks impressive and adds texture. You could use all of it mixed in, but having some on top makes the presentation better.

Panko breadcrumbs are lighter and crispier than regular breadcrumbs. They absorb the butter and mushroom juices without getting dense or heavy. If you only have regular breadcrumbs, they’ll work, but panko gives you better texture.

Broiling at the end is essential for texture and appearance. Baking alone cooks everything through but doesn’t brown the tops. The broiler crisps up the breadcrumbs, melts and slightly caramelizes the cheese, and makes the whole thing look appetizing. Without the broil, they’re fine but not impressive.

Choosing Mushrooms

Medium cremini mushrooms (also called baby bellas) are ideal for stuffing. They’re bigger than white button mushrooms but not as large as full portobello caps. Look for mushrooms that are firm, dry, and have tightly closed gills. Avoid any that feel slimy or have dark, wet spots.

The caps should be relatively uniform in size so they cook evenly. If you have a few that are larger or smaller, adjust the amount of filling accordingly.

Make-Ahead

You can prep the filling a day ahead and store it covered in the refrigerator. You can also stuff the mushroom caps a few hours ahead, cover them with plastic wrap, and refrigerate until you’re ready to bake. If baking from cold, add 5 minutes to the baking time.

Don’t bake them ahead – they’re best served fresh from the oven. Reheated stuffed mushrooms lose their texture and can get soggy.

Serving Size

This recipe makes about 20 medium stuffed mushrooms. As an appetizer, figure 2-3 mushrooms per person, so this serves 6-8 people. If you’re making them for a party, they go fast – people love them and will come back for more.

Variations

With Bacon: Cook 2-3 slices of bacon until crispy, chop them finely, and mix into the filling. Use the bacon fat in place of some of the butter for extra flavor.

With White Wine: After cooking the mushroom stems, deglaze the pan with 2 tablespoons of white wine. Let it reduce completely before adding the shallots and garlic. This adds acidity and depth.

With Nuts: Add 1/4 cup of finely chopped toasted walnuts or pecans to the filling for crunch and richness.

With Spinach: Sauté a handful of fresh spinach with the mushroom stems. Squeeze out any excess moisture before mixing it into the filling.

Different Cheese: Gruyère is traditional and delicious, but you can substitute Comté, aged white cheddar, or Parmesan. Each will give you a slightly different flavor profile.

Gruyère Stuffed Mushrooms · Baked and Broiled