French Onion Mushroom Tart is a delightful dish that brings together the rich flavors of caramelized onions and earthy mushrooms, all nestled in a flaky pastry crust. This recipe is not just a treat for the taste buds; it also carries a touch of French culinary tradition that has been cherished for centuries. Originating from the rustic kitchens of France, tarts have long been a staple in French cuisine, showcasing seasonal ingredients and simple yet elegant preparation methods.
What I love most about this French Onion Mushroom Tart is its incredible balance of taste and texture. The sweetness of the onions perfectly complements the umami of the mushrooms, while the buttery crust adds a satisfying crunch. It’s a dish that can be served as an appetizer, a light lunch, or even a show-stopping centerpiece for a dinner party. Plus, it’s surprisingly easy to make, making it a favorite among home cooks and food enthusiasts alike. Join me as we explore this delicious recipe that is sure to impress your family and friends!
Ingredients:
- 1 sheet of puff pastry, thawed
- 2 tablespoons olive oil
- 2 large onions, thinly sliced
- 8 ounces cremini mushrooms, sliced
- 2 cloves garlic, minced
- 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
- 1 tablespoon balsamic vinegar
- Salt and pepper, to taste
- 1 cup grated Gruyère cheese
- 1 cup ricotta cheese
- 1 egg, beaten (for egg wash)
- Fresh parsley, chopped (for garnish)
Preparing the Puff Pastry
1. Preheat your oven to 400°F (200°C). This will ensure that your tart bakes evenly and gets that lovely golden color. 2. On a lightly floured surface, roll out the thawed puff pastry sheet to fit your tart pan. If you don’t have a tart pan, a baking sheet will work just fine. 3. Gently place the rolled pastry into the tart pan, pressing it into the corners and trimming any excess. If using a baking sheet, simply lay the pastry flat. 4. Prick the bottom of the pastry with a fork to prevent it from puffing up too much while baking. This is a crucial step to ensure a nice, even base for your tart.Caramelizing the Onions and Cooking the Mushrooms
5. In a large skillet, heat the olive oil over medium heat. Once hot, add the sliced onions. Stir them occasionally, allowing them to cook slowly. This process will take about 15-20 minutes, and you want them to become soft and caramelized. Patience is key here! 6. Once the onions are caramelized and golden brown, add the sliced mushrooms to the skillet. Stir well to combine. 7. Add the minced garlic and thyme to the skillet. Cook for an additional 5-7 minutes, until the mushrooms are tender and have released their moisture. 8. Drizzle the balsamic vinegar over the mixture, stirring to combine. Season with salt and pepper to taste. Remove the skillet from heat and let the mixture cool slightly.Preparing the Cheese Mixture
9. In a medium bowl, combine the ricotta cheese and half of the grated Gruyère cheese. Mix well until smooth. This will create a creamy base for your tart. 10. Season the cheese mixture with a pinch of salt and pepper. If you like, you can add a bit more thyme for extra flavor.Assembling the Tart
11. Spread the ricotta and Gruyère mixture evenly over the bottom of the prepared puff pastry. This will act as a delicious base layer. 12. Next, spoon the caramelized onion and mushroom mixture over the cheese layer, spreading it out evenly. Make sure to get a good mix of onions and mushrooms in every bite! 13. Finally, sprinkle the remaining Gruyère cheese on top of the onion and mushroom mixture. This will create a beautiful, cheesy crust as it bakes.Baking the Tart
14. Brush the edges of the puff pastry with the beaten egg. This will give your tart a lovely golden finish. 15. Place the tart in the preheated oven and bake for 25-30 minutes, or until the pastry is puffed and golden brown, and the cheese is bubbling. 16. Once baked, remove the tart from the oven and let it cool for about 5-10 minutes. This will make it easier to slice and serve.Serving the Tart
17. Carefully remove the tart from the pan and transfer it to a serving platter. You can use a spatula to help lift it out if needed. 18. Garnish the tart with freshly chopped parsley for a pop of color and added freshness. 19. Slice the tart into wedges and serve warm. It pairs beautifully with a simple green salad or a glass of white wine. Enjoy your delicious French Onion Mushroom Tart! It’s perfect for a cozy dinner, a gathering with friends, or even as a delightful appetizer. The combination of caramelized onions, earthy mushrooms, and creamy cheese all wrapped in flaky pastry is simply irresistible. Happy cooking!
Conclusion:
In summary, this French Onion Mushroom Tart is an absolute must-try for anyone looking to impress their friends and family with a delicious and elegant dish. The combination of caramelized onions, earthy mushrooms, and rich cheese creates a symphony of flavors that will have everyone coming back for seconds. Plus, the flaky pastry crust adds the perfect texture, making each bite a delightful experience. For serving suggestions, I recommend pairing this tart with a simple green salad dressed with a light vinaigrette to balance the richness of the tart. You can also serve it as an appetizer at your next gathering, or even as a main dish alongside a hearty soup. If you’re feeling adventurous, consider adding some fresh herbs like thyme or rosemary for an extra layer of flavor, or even experimenting with different types of cheese to suit your taste. I truly encourage you to try this French Onion Mushroom Tart for yourself. I promise it will not disappoint! Once you’ve made it, I’d love to hear about your experience. Share your thoughts, any variations you tried, or even a photo of your creation. Let’s celebrate the joy of cooking together! Happy baking! Print
French Onion Mushroom Tart: A Delicious Recipe for Savory Lovers
- Total Time: 50 minutes
- Yield: 6–8 slices 1x
Description
Enjoy a savory French Onion Mushroom Tart with a flaky puff pastry crust, filled with caramelized onions, earthy mushrooms, and a creamy cheese blend. This dish is perfect for cozy dinners or as an impressive appetizer that will delight your guests.
Ingredients
- 1 sheet of puff pastry, thawed
- 2 tablespoons olive oil
- 2 large onions, thinly sliced
- 8 ounces cremini mushrooms, sliced
- 2 cloves garlic, minced
- 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
- 1 tablespoon balsamic vinegar
- Salt and pepper, to taste
- 1 cup grated Gruyère cheese
- 1 cup ricotta cheese
- 1 egg, beaten (for egg wash)
- Fresh parsley, chopped (for garnish)
Instructions
- Preheat your oven to 400°F (200°C).
- On a lightly floured surface, roll out the thawed puff pastry sheet to fit your tart pan. Gently place it into the pan, pressing into the corners and trimming excess. Prick the bottom with a fork.
- In a large skillet, heat olive oil over medium heat. Add sliced onions and cook for 15-20 minutes until soft and caramelized.
- Add sliced mushrooms to the skillet with the onions. Stir in minced garlic and thyme, cooking for an additional 5-7 minutes until mushrooms are tender. Drizzle with balsamic vinegar and season with salt and pepper. Remove from heat and let cool slightly.
- In a medium bowl, combine ricotta cheese and half of the grated Gruyère cheese. Mix until smooth and season with salt and pepper.
- Spread the ricotta mixture evenly over the puff pastry. Spoon the caramelized onion and mushroom mixture on top, then sprinkle with the remaining Gruyère cheese.
- Brush the edges of the pastry with the beaten egg. Bake for 25-30 minutes until the pastry is puffed and golden, and the cheese is bubbling.
- Let the tart cool for 5-10 minutes before transferring to a serving platter. Garnish with chopped parsley, slice into wedges, and serve warm.
Notes
- For a vegetarian option, ensure that the cheese used is rennet-free.
- This tart pairs well with a simple green salad or a glass of white wine.
- Prep Time: 20 minutes
- Cook Time: 30 minutes

