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Amazing Mushroom & Gruyère Puff Pastry

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lilyaBlog

October 1, 2025

A delicious slice of Mushroom & Gruyère Puff Pastry, showcasing the flaky crust and savory filling.

Oh my goodness, you have GOT to try this Mushroom & Gruyère Puff Pastry! Seriously, it’s one of those recipes that looks super fancy but is honestly, ridiculously easy to whip up. I remember making these for my book club last month, and everyone was raving about them, asking if I’d spent hours slaving away. Little did they know, this elegant appetizer came together in barely any time at all. The combination of earthy mushrooms and that nutty, melted Gruyère tucked inside layers of flaky puff pastry? Pure magic! It’s officially my go-to for when I want something impressive without the fuss. Trust me, this Mushroom & Gruyère Puff Pastry will become your new favorite, too!

Close-up of a sliced Mushroom & Gruyère Puff Pastry showing flaky layers and mushroom filling.

Why You’ll Love This Mushroom & Gruyère Puff Pastry

Get ready to impress with this fantastic recipe!

  • Super Easy: Seriously, it’s practically foolproof!
  • Quick to Make: Perfect for last-minute entertaining.
  • Incredible Flavor: Earthy mushrooms meet nutty Gruyère.
  • Elegant & Impressive: Looks like it came from a fancy bakery!
  • Versatile: Great as an appetizer, a light lunch, or even a side dish.
  • Crispy & Flaky: That puff pastry crunch is just unbeatable.

Ingredients for Your Mushroom & Gruyère Puff Pastry

Okay, gathering your goodies is the first real step! You really only need a few things, most of which you might already have. Here’s exactly what you’ll need to snag:

  • 1 sheet of puff pastry, make sure it’s thawed out!
  • 1 tablespoon of olive oil – just a little drizzle.
  • About 8 ounces of mushrooms, sliced up. Any kind works, but I love baby bellas!
  • 1 clove of garlic, minced nice and fine.
  • A pinch of salt (1/4 teaspoon should do!), and just a dash of black pepper (about 1/8 teaspoon).
  • 4 ounces of Gruyère cheese, grated. Oh, this cheese is the star here!
  • And one egg, lightly beaten, for that gorgeous golden wash.

A slice of Mushroom & Gruyère Puff Pastry showing flaky layers and mushroom filling.

Essential Equipment for Making Mushroom & Gruyère Puff Pastry

Alright, let’s talk tools! You don’t need anything super fancy, but having the right gear makes this mushroom and Gruyère number even easier. You’ll absolutely need a large skillet for getting those mushrooms nice and tender. Grab yourself a trusty baking sheet, and definitely line it with parchment paper – it makes cleanup a breeze and stops anything from sticking. Oh, and a fork is handy if you decide to crimp those edges! Easy peasy, right?

Step-by-Step Guide to Your Mushroom & Gruyère Puff Pastry

Alright, let’s get baking! This is where the magic really happens. Don’t worry, it’s all super straightforward. Just follow along these steps, and you’ll have these delicious pastries ready in no time.

Preparing the Mushroom Filling

First things first, get your oven preheated to 400°F (that’s 200°C). While it’s warming up, grab a skillet and heat up that tablespoon of olive oil over medium heat. Toss in your sliced mushrooms, and let them cook down until they’re nice and a little bit browned – this usually takes about 5 to 7 minutes. Then, toss in your minced garlic, salt, and pepper and give it a quick stir for about a minute until you can smell that yummy garlic. Take it off the heat and let it cool down just a smidge. We want it warm, not piping hot, when it goes on the pastry. You could even add some of that honey curry roasted cauliflower spice here if you’re feeling adventurous!

Assembling Your Mushroom & Gruyère Puff Pastry

Now for the fun part – putting it all together! Gently unfold your thawed puff pastry sheet onto a lightly floured counter. Spread that lovely mushroom mix evenly over one half, leaving a little border all around so nothing squishes out. Then, generously sprinkle all that gorgeous grated Gruyère cheese over the mushrooms. It’s going to melt into pure bliss! Carefully fold the other half of the puff pastry over the filling, like you’re tucking it in. Press those edges together firmly to seal them shut. I like to use a fork to crimp the edges – it looks pretty and helps make sure it stays sealed. Next, cut a few little slits on top; this lets the steam escape so your pastry doesn’t puff up too much in the wrong places. Finally, brush the whole top with your beaten egg wash; this is what gives it that beautiful golden-brown color. Think of pairing it with some roasted potatoes with baked feta for a full meal!

Close-up of a sliced Mushroom & Gruyère Puff Pastry, showcasing the flaky crust and savory filling.

Baking the Perfect Puff Pastry

Carefully transfer your masterpiece onto the prepared baking sheet. Pop it into that preheated oven and let it bake for about 20 to 25 minutes. You’re looking for a gorgeous, golden-brown color and that signature puff pastry lift! Once it’s looking perfect, take it out and let it cool on the baking sheet for just a few minutes before you slice into it. That little bit of cooling time makes sure everything doesn’t just explode out when you cut it.

Tips for the Best Mushroom & Gruyère Puff Pastry

Hey, so you want to make these pastries absolutely sing? I’ve picked up a few tricks over the years that really make a difference, and I’m happy to share! First off, puff pastry is a bit like a diva – it needs to be treated right. Make sure it’s thawed properly according to the package, but not *too* thawed, you know? If it gets too warm, it won’t puff up like it should. I also find that gently pressing out any excess water from the mushrooms after cooking helps keep the pastry from getting soggy. Little things like these really elevate the whole experience, just like a perfectly seasoned garlic parmesan chicken pasta!

Ingredient Notes and Substitutions

Let’s talk ingredients for a sec. Gruyère is fantastic here because it’s got that nutty, slightly sweet flavor that just melts like a dream. But hey, if you can’t find Gruyère or want to mix things up, a good quality Swiss cheese or even a sharp cheddar can work in a pinch! They won’t give you *exactly* the same taste, but they’ll still be delicious. And for those mushrooms, while I used baby bellas, feel free to use shiitake for a deeper flavor or even a mix! Oh, and if you’re feeling a bit fancy, a tiny pinch of dried thyme or even some fresh chives chopped in with the mushrooms and garlic adds a lovely extra layer of flavor. It’s kind of like how adding a sprinkle of parmesan makes crispy baked parmesan zucchini that much better – simple additions make a big impact!

Serving and Storing Your Mushroom & Gruyère Puff Pastry

Alright, the hardest part is over – your amazing Mushroom & Gruyère Puff Pastry is baked to golden perfection! Let them hang out on the baking sheet for just a few minutes before slicing. This lets the cheese settle a bit and keeps everything from sliding out. They’re truly divine served warm, maybe with a little side salad, or as part of a larger spread. They’d be fantastic alongside some light Mediterranean chicken gyros or even as a tasty complement to something like Thai peanut chicken wraps. If you happen to have any leftovers (which is rare in my house!), just pop them in an airtight container in the fridge. To get them nice and crispy again, a quick warm-up in a medium oven (around 350°F is good) for about 5-10 minutes does the trick perfectly!

Close-up of a sliced Mushroom & Gruyère Puff Pastry on a wooden board, showcasing the flaky crust and savory filling.

Frequently Asked Questions about Mushroom & Gruyère Puff Pastry

Got questions? I’ve got answers! It’s always good to check on common things when you’re trying a new recipe. Here are a few things people often ask me about this Mushroom & Gruyère Puff Pastry:

Can I make this ahead of time?

You know, you *can* prepare the mushroom filling ahead of time and keep it in the fridge for a day or two. However, the puff pastry itself is best assembled and baked right before you plan to serve it. Puff pastry gets a little sad if it sits around too long after being handled, so try to do that part closer to eating time!

What other cheeses can I use instead of Gruyère?

Oh, Gruyère is my favorite for its nutty depth, but don’t be afraid to experiment! A good sharp white cheddar, Swiss cheese (like Emmental), or even a mild provolone would be really tasty. For something a bit different, a crumbled goat cheese or a sprinkle of Parmesan could also add a lovely twist. Think about flavors you love – that’s your best guide!

Can I add other vegetables to the filling?

Absolutely! This pastry is really forgiving. Finely chopped spinach, caramelized onions, or even some finely diced bell peppers that you sauté along with the mushrooms would be delicious. Just make sure the veggies aren’t too watery after cooking. You might even want to try it with some easy breakfast quiche-style veggies!

How do I prevent the bottom from getting soggy?

A couple of things help here! First, making sure your mushroom filling isn’t too wet is key. Cook those mushrooms down well and drain any excess liquid. Also, preheating your oven properly and baking on a hot baking sheet helps set the bottom quickly. My friend who makes a killer cheesy vegetable chowder always says a hotter baking surface is your secret weapon for crispy bottoms!

Estimated Nutritional Information

So, let’s chat about the numbers! When you whip up this delicious Mushroom & Gruyère Puff Pastry, each serving is roughly around 350 calories. You’re looking at about 25 grams of fat, 20 grams of carbs, and a solid 10 grams of protein. Of course, these numbers are just estimates, right? They can totally change depending on the exact brands of puff pastry, cheese, and oil you use. But it gives you a good idea!

Share Your Mushroom & Gruyère Puff Pastry Creations!

Okay, now it’s YOUR turn! I absolutely love hearing from you guys. Did you try making this Mushroom & Gruyère Puff Pastry? What did you think? Drop a comment below to let me know your experience, or even better, share a picture of your gorgeous creation on social media and tag me! You can find all my baking adventures over on my about me page, so give me a follow! Seeing your results makes my day!

Print

Mushroom and Gruyère Puff Pastry

A simple puff pastry filled with sautéed mushrooms and melted Gruyère cheese.

  • Author: Mary
  • Prep Time: 15 min
  • Cook Time: 25 min
  • Total Time: 40 min
  • Yield: 4 servings 1x
  • Category: Appetizer
  • Method: Baking
  • Cuisine: French
  • Diet: Vegetarian

Ingredients

Scale
  • 1 sheet puff pastry, thawed
  • 1 tbsp olive oil
  • 8 oz mushrooms, sliced
  • 1 clove garlic, minced
  • 1/4 tsp salt
  • 1/8 tsp black pepper
  • 4 oz Gruyère cheese, grated
  • 1 egg, beaten (for egg wash)

Instructions

  1. Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
  2. Heat olive oil in a skillet over medium heat. Add mushrooms and cook until browned and tender, about 5-7 minutes.
  3. Add garlic, salt, and pepper to the skillet. Cook for 1 minute more until fragrant. Remove from heat and let cool slightly.
  4. Unfold the puff pastry sheet onto a lightly floured surface.
  5. Spread the mushroom mixture evenly over one half of the puff pastry, leaving a small border.
  6. Sprinkle the Gruyère cheese over the mushrooms.
  7. Fold the other half of the puff pastry over the filling. Press the edges to seal. You can crimp the edges with a fork.
  8. Cut a few small slits in the top of the pastry to allow steam to escape.
  9. Brush the top of the pastry with the beaten egg wash.
  10. Transfer the pastry to the prepared baking sheet.
  11. Bake for 20-25 minutes, or until the pastry is golden brown and puffed.
  12. Let cool for a few minutes before slicing and serving.

Notes

  • For extra flavor, you can add a pinch of thyme to the mushroom mixture.
  • Ensure your puff pastry is well-chilled before baking for the best puff.

Nutrition

  • Serving Size: 1 serving
  • Calories: 350
  • Sugar: 2
  • Sodium: 400
  • Fat: 25
  • Saturated Fat: 12
  • Unsaturated Fat: 13
  • Trans Fat: 0
  • Carbohydrates: 20
  • Fiber: 3
  • Protein: 10
  • Cholesterol: 60

Keywords: Mushroom Gruyère Puff Pastry, savory pastry, cheese pastry, mushroom appetizer, easy appetizer

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