These stuffed mushrooms take about 35 minutes start to finish, and the filling is literally one ingredient — a block of Boursin cheese. That’s the whole appeal. They look put-together enough to serve at a party, but there’s no chopping, no sauce, no fuss.
What makes this version work
Two things matter here. First, brushing the caps with olive oil before baking — it keeps the mushrooms from drying out and helps them release their moisture downward into the pan rather than pooling inside the cap and making the filling watery. Second, the panko-parmesan topping. Panko stays crunchier than regular breadcrumbs at this temperature, and that contrast with the soft cheese underneath is what makes the texture interesting. Don’t swap in fine breadcrumbs; they go pasty.
Mistakes to avoid
- Using wet mushrooms. Rinse them quickly if you need to, but dry them thoroughly with a paper towel before oiling. Wet caps steam instead of roast and the filling slides around.
- Overfilling the caps. Boursin softens and spreads as it heats. Pack it in too high and it bubbles over the sides, leaving you with a mess on the pan and not much inside the mushroom.
- Pulling them straight from the fridge. Cold Boursin is stiff and harder to spoon neatly. Let the cheese sit at room temperature for 10 minutes before you start — it fills much more cleanly.
- Skipping the parchment. The mushroom juices caramelize on a bare pan and stick. Parchment means no scrubbing and the mushrooms lift off cleanly.
- Serving them too hot. The filling is molten right out of the oven. Give them 3–4 minutes to cool slightly — the cheese firms up just enough to stay in place when someone picks one up.
Make-ahead notes
You can stuff the mushrooms up to 4 hours ahead — brush with oil, fill, add the topping, then cover the tray loosely with plastic wrap and refrigerate. Add 3–4 minutes to the bake time since they’re going in cold. Skip the garnish — not worth the extra dish — just add a quick pinch of parsley if you want color right before serving. Already-baked mushrooms reheat reasonably well: 5 minutes in a 350°F oven brings them back without turning the caps rubbery. The microwave works in a pinch but softens the topping. Don’t freeze them; the mushrooms turn spongy after thawing.
Boursin Stuffed Mushrooms
Ingredients
- 12 large mushrooms preferably cremini or button, stems removed and cleaned
- 5 oz Boursin cheese Garlic & Fine Herbs flavor
- 2 tbsp olive oil extra virgin, for brushing
- 1 tbsp parmesan cheese freshly grated
- 1 tbsp breadcrumbs panko preferred for extra crunch
- 1 tbsp minced fresh parsley for garnish
- ¼ tsp black pepper freshly ground
Instructions
- Preheat your oven to 190°C (375°F). Line a baking sheet with parchment paper.
- Lightly brush the mushroom caps with olive oil and place them stem-side up on the prepared baking sheet.
- Spoon approximately a teaspoonful of Boursin cheese into each mushroom cap, filling it evenly.
- In a small bowl, combine the grated parmesan and breadcrumbs. Sprinkle this mixture evenly over the filled mushrooms.
- Bake in the preheated oven for 15-20 minutes, or until the mushrooms are tender and the topping is golden brown.
- Remove from oven and let cool slightly. Garnish with minced fresh parsley and a dash of freshly ground black pepper before serving.
Notes
Nutrition
FAQ
Can I use a different flavor of Boursin?
Yes, any Boursin flavor works in this recipe. Shallot and Chive is a popular swap, and the Pepper variety adds a noticeable kick without needing extra seasoning.
What size mushrooms should I buy?
Look for caps that are roughly 1.5 to 2 inches across — large enough to hold a good teaspoon of filling without being so big they take forever to cook through. Most grocery stores label these as ‘large’ cremini or portobello baby caps.
My mushrooms are releasing a lot of liquid in the pan. Is that normal?
Some liquid is normal, but a lot usually means the caps weren’t dried well before oiling, or the oven temperature was too low. Make sure your oven is fully preheated to 375°F before the tray goes in.
Can I make these without parmesan?
You can leave it out and just use panko on top — the topping will still brown and add crunch. Nutritional yeast is a reasonable stand-in if you want a savory, slightly cheesy flavor without dairy.
How do I keep them warm if I’m serving them at a party?
A low oven at 200°F holds them well for up to 20 minutes after baking. Any longer and the mushrooms start to shrink and the caps get soft.
Can I use baby bella mushrooms instead of button mushrooms?
Baby bellas are cremini mushrooms — the names are interchangeable, so yes, they’re exactly what the recipe calls for. They have a slightly deeper flavor than white button mushrooms and both work well here.
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