Mushroom Puff Pastry Bites

‘Tis the time of year to celebrate togetherness, good cheer, and quite notably, appetizers. Pop a few Mushroom Puff Pastry Bites into your mouth, and let’s rejoice!

The holidays are prime season for dips, chips, and all sorts of cute little morsels made to be munched in a single chomp like today’s mushroom puff pastry bites.

Whether you’re hosting a soiree, feeding surprise guests, or drifting from party to party in your light-up snowman sweater, the appetizer spread is a critical component of any holiday event.

I mean, a party without Crab Stuffed Mushrooms or Salmon Croquettes is just sad—right?!

My go-to easy appetizer: puff pastry anything.

Ever since making these Cranberry Brie Bites, I’ve been smitten with puff pastry as the ideal vehicle for all manners of tasty toppings.

• Flakey, buttery, and universally appealing, frozen puff pastry is an effortless shortcut that is nonetheless impressive and irresistible.
• Leave large for an Easy Asparagus Tart or use a baby biscuit cutter to create bite-sized, poppable hors d’oeuvres.
• Sweet or savory—both are splendid options. Why not make both? Try Pesto Pinwheels for a starter and Puff Pastry Cinnamon Rolls for dessert!

For today’s puff pastry bites, I’m keeping things savory with caramelized onions, tender earthy mushrooms, and flavorful Gruyere cheese.

Better call some guests over because these mushroom puff pastry bites are about to be all dressed up and need a place to go!

How to Make Mushroom Puff Pastry Bites

With aged Gruyere, slightly crisp caramelized onions, tender earthy mushrooms, and slightly, and puffed golden pastry, these mushroom puff pastry bites won’t last long at your next event (better bring a batch of these Brie Bites for backup).

The Ingredients

• Frozen Puff Pastry. A versatile freezer staple that can be used to make stuffed pockets of joy (ahem, Salmon Wellington), or, an even easier option, mini pizza-like tarts smothered in tasty toppings.
• Mushrooms. Earthy, tender, and aromatic, I went for everyday baby bella (aka crimini) mushrooms for these savory little tartlets, just like I used in Mushroom Soup. (If you love mushroom apps, definitely try Sausage Stuffed Mushrooms or Crab Stuffed Mushrooms.)
• Onions + Garlic. Adding caramelized onions to any appetizer with a hint of garlic somehow adds at least 10 fancy points to any recipe.
• Mustard. A small dollop of zippy whole grain mustard on each puff pastry round adds a little zip.
• Gruyere. This pungent, aged cheese tastes and smells AMAZING as it melts and pairs perfectly with the mushrooms. Swiss or an extra sharp cheddar would also be nice options. (It’s also divine in these Crab Artichoke Toasts.)
• Thyme + Parsley. For color, freshness, and a little extra woodsy aromatic flair.
• Egg. Adds shine to each puff pastry piece as it bakes.

The Directions

1. Caramelize the onions. Set aside.
2. Sauté the mushrooms, then add garlic, thyme, and black pepper.
3. Combine with the onions and stir in the cheese.
4. Roll out the puff pastry and cut into 50 equal-sized rounds or squares.
5. Brush the pastry with an egg wash, prick each with a fork, then top lightly with the mustard, and mushroom mixture.
6. Bake until the pastry is golden and crisp. ENJOY!

Storage Tips

• To Store. Puff pastry bites may be kept refrigerated for up to two days in an airtight container.
• To Reheat. To warm and crisp up chilled mushroom puff pastry bites, bake in a 400 degree F oven for 3-5 minutes until heated through.

So where’s the party? I have a platter of mushroom puff pastry bites in hand.

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Mushroom Puff Pastry Bites

4.80 from 20 votes

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Vegetarian mushroom puff pastry bites with Gruyere and mustard are an easy, crowd-pleasing appetizer perfect for parties and holidays.

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Prep: 10 minutes mins

Cook: 1 hour hr 10 minutes mins

Total: 1 hour hr 25 minutes mins

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Servings: 50 bites

Review Save Recipe SavedPrint

Ingredients

  

1x2x3x

• 2 tablespoons extra virgin olive oil divided
• 1 large yellow onion thinly sliced
• 1/2 teaspoon kosher salt
• 16 ounces baby bella mushrooms sliced
• 1/2 teaspoon minced garlic
• 2 teaspoons finely chopped fresh thyme leaves or 1/2 teaspoon dried
• 1/4 teaspoon ground black pepper
• 1/2 cup shredded Gruyere Swiss, or similar cheese (about 1 1/2 ounces)
• 2, 10- inch square sheets frozen puff pastry thawed
• 1 egg beaten
• 3 tablespoons whole-grain mustard
• Chopped fresh parsley for garnish

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Instructions

 

• Place racks in the upper and lower thirds of your oven and preheat the oven to 400 degrees F. Line two large baking sheets with silicone baking mats or parchment paper. Set aside.
• In a large skillet over medium-low heat, heat 1 tablespoon olive oil and add the onions and salt. Sauté the onions until beginning to brown, then reduce heat to low and continue to cook, stirring occasionally, until deeply golden and caramelized, about 25 minutes total. Remove the onions to a large bowl and set them aside.
• In the same skillet, heat the remaining tablespoon olive oil over medium-low and sauté the mushrooms until tender, about 5 minutes. Add garlic, thyme, and black pepper and sauté for 1 additional minute. Place in the bowl with the onions. Stir in the cheese.
• On a lightly floured work surface, roll out the puff pastry into an even 10.5-inch square. With a 2-inch round cookie or biscuit cutter, cut the pastry into rounds (alternatively, you can slice the puff pastry into squares to limit waste). You should have approximately 5 rows of 5 rounds (25 total rounds per sheet).
• Transfer the cut puff pastry to a prepared baking sheet, then brush lightly with the beaten egg. Prick each round with a fork to allow air to escape, then top each round with a scant 1/4 teaspoon of the whole grain mustard, then 1 tablespoon of the mushroom and onion filling. Repeat with the second pastry sheet.
• Bake for 25 minutes, until the pastry is golden and crisp, rotating the pans 180 degrees and switching the positions of the baking sheets on the upper and lower racks halfway through. Let bites cool for 5 minutes. Garnish with fresh parsley and serve warm or at room temperature.

Notes

• TO STORE: Puff pastry bites may be kept refrigerated for up to two days in an airtight container.
• TO REHEAT: To warm and crisp up chilled mushroom puff pastry bites, bake in a 400 degree F oven for 3-5 minutes until heated through.
• TO MAKE AHEAD: Fully bake the mushroom puff pastry bites, as directed, then place them in an airtight container separating any layers with parchment or wax paper, and freeze for up to two weeks. To serve, reheat directly from frozen in a 400 degree F oven for 5 minutes, or until hot. Alternatively, the mushroom onion topping can be prepped and refrigerated 2 days in advance. When ready to bake, top the puff pastry and finish the recipe as directed.

Nutrition

Serving: 1(of 50)Calories: 69kcalCarbohydrates: 5gProtein: 2gFat: 5gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gTrans Fat: 1gCholesterol: 5mgPotassium: 54mgFiber: 1gSugar: 1gVitamin A: 22IUVitamin C: 1mgCalcium: 18mgIron: 1mg

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