Twelve mushroom caps, one block of Boursin, a handful of parsley, and 30 minutes — that’s the whole deal. These stuffed mushrooms are the kind of appetizer you can double or triple without breaking a sweat, which makes them genuinely useful when you’re feeding a crowd. They come out of the oven warm, cheesy, and gone fast.
Why this recipe works
Two things matter here. First, baking at 400°F is hot enough to drive off the moisture the mushrooms release, so you get tender caps instead of a watery puddle on the baking sheet. Second, Boursin already contains garlic, herbs, and enough fat to stay creamy under heat — you don’t need to add cream cheese or eggs to stabilize the filling. It holds its shape, browns lightly on top, and doesn’t weep. That combination of a high oven temp and a pre-seasoned, high-fat cheese is why this works with almost no effort.
About the ingredients
- Boursin (Garlic Fine Herbs): Sold near the specialty cheeses, not the cream cheese. It comes in a 5.2 oz package. Two packages will fill about 24 large caps if you’re scaling up for a party.
- Mushroom size matters: Large white button mushrooms — look for caps at least 2 inches across. Smaller ones don’t hold enough filling to be worth the effort, and cremini work just as well if that’s what’s available.
- Herbed cream cheese swap: If you can’t find Boursin, use full-fat herbed cream cheese and add an extra pinch of garlic powder and dried chives. The texture will be slightly denser but the flavor is close.
Leftovers and make-ahead
Cooked mushrooms keep in the fridge for up to 3 days in an airtight container, though they soften further as they sit. Reheat on a baking sheet at 375°F for about 8 minutes — the microwave turns them rubbery, so skip it. For make-ahead, stuff the raw caps up to 24 hours in advance, cover the tray tightly with plastic wrap, and refrigerate. Pull them out while the oven preheats and add 3 to 4 minutes to the bake time since they’ll be cold. Skip the garnish of extra parsley on top before storing — not worth the extra dish, just add a fresh pinch right before serving. Freezing isn’t recommended; the mushrooms turn mushy after thawing.
What can go wrong
- Filling slides off during baking: The cavity needs to face straight up. If your baking sheet is warped or uneven, the caps tilt and the cheese runs out. Use a flat, rimmed sheet and press each cap gently so it sits level before filling.
- Cheese browns too fast before the mushroom is cooked: This usually means the caps were too small or the oven runs hot. Check at 15 minutes — if the tops are already dark but the mushroom still feels firm, tent loosely with foil and give them 4 more minutes.
- Filling is too stiff to spoon: Boursin straight from the fridge is firm. Let it sit at room temperature for 10 minutes before mixing. It’ll blend with the parsley much more easily and mound into the caps without tearing them.
- Mushrooms shrink dramatically: That’s normal — they lose a lot of water as they cook. Buy the largest caps you can find, and mound the filling generously so there’s still a good ratio of cheese to mushroom after shrinkage.
- Soggy bottoms on the baking sheet: Even dry mushrooms release liquid as they bake. Line the sheet with parchment, not foil — parchment lets a little air circulate underneath and the bottoms stay firmer.
Boursin Stuffed Mushrooms
Equipment
- 1 Baking sheet
- 1 Mixing bowl
- 1 Spoon
Ingredients
- 12 large white button mushrooms stems removed
- ⅔ cup Boursin cheese Garlic & Fine Herbs flavor
- 1 tablespoon olive oil extra virgin
- 1 pinch black pepper freshly ground
- 1 tablespoon fresh parsley finely chopped
Instructions
- Preheat the oven to 200°C (400°F).
- Arrange the mushroom caps on a baking sheet, cavity facing up.
- In a mixing bowl, combine the Boursin cheese and chopped parsley. Mix until well blended.
- Using a spoon, fill each mushroom cap with the cheese mixture, allowing a slight mound of filling.
- Drizzle the mushrooms with olive oil and sprinkle with freshly ground black pepper.
- Bake in the preheated oven for 15-20 minutes until the mushrooms are tender and the cheese is lightly golden.
Notes
Nutrition
FAQ
Can I make these for a large group — say, 40 to 50 pieces?
Yes, and this recipe scales easily. Bake in batches on separate sheets rather than crowding everything onto one pan — overcrowding traps steam and makes the mushrooms soggy. You can stuff all the caps ahead of time, refrigerate them on trays, and rotate batches through the oven every 20 minutes so they come out hot in waves.
Do I need to cook the mushroom stems before discarding them?
No — just pull them out and discard or save them for another use like a quick sauté or soup. The stems don’t go into this filling, so there’s nothing to pre-cook.
How do I keep the mushrooms warm if I’m serving them at a party?
A low oven at 200°F will hold them for up to 20 minutes without overcooking. Longer than that and the mushrooms start to collapse, so time your batches accordingly.
My store only has small Boursin wheels — how much do I need?
The recipe uses about two-thirds of a standard 5.2 oz package for 12 large caps. If you’re scaling to 24 caps, buy two packages so you’re not scraping the container.
What to cook next
- Quick Mini Beef Wellingtons
- Perfect Seared Scallops
- Easy Classic French Crêpes
- Quick Skillet Garlic Flatbreads