Would you LOOK at all those mushrooms? If you're a mushroom lover (like me), you're going to simply love this small savory tart. Loaded with mushrooms and gruyere cheese, this Puff Pastry Mushroom Gruyere Tart is perfect for entertaining and tastes amazing!

Ingredients
- Puff pastry - Make sure to complete thaw it in the refrigerator before using it in this recipe.
- Cheese - I really love gruyere cheese in this dish.
- Mushrooms - We use white mushrooms for this tartlet.
- Butter - Unsalted butter will add additional flavor to the mushrooms.
- Olive Oil
- Thyme - Fresh thyme is the perfect herb for mushrooms.
- Flour - We use the all-purpose variety in this recipe
- Egg - We only use a little bit of the egg to brush onto the outer edges. The eggwash is what gives the pastry the perfectly browned edges.
- Salt
Note: Refer to the recipe card below for exact quantities.
Instructions
Time needed: 40 minutes.
How to Make Puff Pastry Mushroom Gruyere Tart
- Step 1
Prepare the Pastry
The puff pastry should be completed thawed in the refrigerator and the oven will need to be preheated to 400 degrees F. After lightly dusting some flour onto your work surface, you will need to lay out the pastry and make serrated edges with a knife or pizza cutter, leaving about ½ inch around each edge. One cup of shredded gruyere cheese should be spread out over the pastry leaving the border clean. - Step 2
Prepare the Mushrooms
After mushrooms are prepped and clean, saute them in a little olive oil and butter for 6-8 minutes. Drain any excess liquid when finished, then spread them out across the cheese. - Step 3
Prepare an Egg Wash
Prepare an egg wash by whisking egg yolk and 2T of water. After the pastry bakes for about 15 minutes, use a pastry brush to lightly brush egg wash over the border. Return to oven and bake 5-10 more minutes until it turns light brown in color. - Step 4
Assemble and Serve
Remove from the oven and garnish with thyme (if desired). Cut pastry into four pieces and serve warm.
Variations
- Add-ins - Caramelized onions would make a nice addition to this pastry.
Equipment
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- Pastry sheet
- Pastry brush
- Cheese grater
- Pizza Cutter
- Fry pan
- Baking sheet
- Parchment paper
- Colander
Storage
Store in the refrigerator in an airtight container for 2-3 days.
This dish is not freezer friendly.
More Recipes
Have leftover ingredients?
- Gruyere cheese is great in French Onion Soup. It also makes a killer grilled cheese!
In the mood for a similar dish?
More holiday and entertaining recipes you will love:
FAQ
The simple answer is yes, but it will lose some of its crispy texture. Puff pastry can be reheated in an air fryer, in the oven, or in the microwave. Make sure that you don't store your puff pastry for more than a few days in the refrigerator because it can develop mold.
There are differing opinions on this. If mushrooms look fairly clean, then a damp cloth should work just fine to clean them up a bit. If they are really dirty, you can try shaking them clean in a colander, but you may have to result to washing them under water.
📖 Recipe
Puff Pastry Mushroom Gruyere Tart
Equipment
- Pastry sheet
- Pastry brush
- Pizza Cutter
- Baking sheet
- Parchment paper
Ingredients
- 1 sheet Puff pastry (thawed)
- 1 heaping cup Gruyere cheese (shredded)
- 12 ounces Mushrooms (sliced)
- 1 tablespoon Butter
- 1 tablespoon Olive oil
- 3 twigs Thyme (fresh)
- ½ teaspoon Salt (or to taste)
- 1 dash All purpose flour (for dusting)
- 1 qty Egg for egg wash
Instructions
- Thaw puff pastry in the refrigerator according to package directions.
- Preheat oven to 400 degrees.
- Lightly dust some flour on a large sheet of parchment paper.
- Unroll one pastry sheet and place it on top of a lightly floured surface.
- Using a knife or pizza cutter, gently serrate about ½ inch all the way around the edge of the pastry.
- Sprinkle one heaping cup of shredded Gruyere cheese in the center while leaving the border clean.
- Wipe mushrooms clean. Heat olive oil and butter in a frying pan on medium heat. Season and saute mushrooms until softened for approximately 6-8 minutes. Drain liquid.
- Spread mushrooms on top of cheese.
- Transfer pastry to a baking sheet and bake for 15 minutes. Using a pastry brush, lightly brush egg wash over the border and then continue baking for another 5-10min.
- Remove from the oven and top with thyme (if desired). Cut into 4 pieces and serve warm. Mushrooms will get darker in color as it cools.
Food Safety
- Wash hands and create a clean work area.
- Rinse fresh produce thoroughly.
- Do not use the same cutting board or utensils on cooked food or produce, that previously touched raw meat or seafood.
- Do not leave food sitting out at room temperature for extended periods.
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