Puff Pastry Mushroom Tart

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This puff pastry mushroom tart is earthy, aromatic, and savory with an upscale look, yet quick and uncomplicated to prepare using puff pastry. Delicious served with a cup of soup or salad, it's also a great appetizer when cut into smaller pieces.

By Pat Bernitt
Published on April 4, 2023
square puff pastry tart with mushrooms on a board
Prep Time:
15 mins
Cook Time:
20 mins
Total Time:
35 mins
Servings:
6 servings
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Ingredients

Original recipe (1X) yields 6 servings servings

  • 12 ounces cremini mushrooms, such as Baby Bella®

  • 1/2 red onion, sliced vertically

  • 1 tablespoon olive oil

  • 1 tablespoon unsalted butter

  • 2 tablespoons low-sodium soy sauce

  • 1 teaspoon dried thyme

  • 2 garlic cloves, minced

  • salt and freshly ground black pepper to taste

  • 1/2 (17.3 ounce) package frozen puff pastry, thawed

  • 1 1/2 cups shredded Gruyere cheese

  • 1 large egg, beaten

  • 1 teaspoon dried thyme, or as needed for garnish (optional)

Directions

  1. Preheat the oven to 400 degrees F (200 degrees C). Line a baking sheet with parchment paper.

  2. Cut mushrooms into 1/4-inch-thick slices (don’t cut too thinly).

  3. Heat olive oil and butter in a large skillet over medium heat. Add mushrooms and onion and cook, stirring occasionally, until mushrooms are golden and onions are soft and translucent, 6 to 8 minutes.

  4. Stir in soy sauce, thyme, and garlic and cook until fragrant, 30 to 60 seconds. Season with salt and pepper; set aside.

  5. Unfold puff pastry sheet onto a lightly-floured work surface. Gently pat down or roll out dough with a rolling pin into a 10x10-inch square. Using a sharp knife, score a line about 1/2 inch from all edges to create a border, being careful not to cut all the way through. Use a fork to generously prick pastry sheet all over inside the border.

  6. Transfer puff pastry to the baking sheet, and brush the borders with beaten egg. Evenly spread Gruyere cheese inside the border, and top with mushroom mixture.

  7. Bake until tart is puffed and lightly browned, 10 to 12 minutes. Garnish with additional thyme, and serve warm.

Cook's Note:

If you’re unable to use Gruyere, Swiss cheese is a decent substitute, but won’t quite be as tasty as the Gruyere.

Nutrition Facts (per serving)

414 Calories
30g Fat
23g Carbs
15g Protein
Nutrition Facts
Servings Per Recipe 6
Calories 414
% Daily Value *
Total Fat 30g 38%
Saturated Fat 9g 47%
Cholesterol 67mg 22%
Sodium 545mg 24%
Total Carbohydrate 23g 8%
Dietary Fiber 1g 4%
Total Sugars 2g
Protein 15g 29%
Vitamin C 1mg 1%
Calcium 314mg 24%
Iron 2mg 10%
Potassium 351mg 7%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.