French Onion Tart Recipe

French Onion Tart Recipe

Ok, let’s be real – you know those days when you’re craving something utterly delicious but also want to try something new? What is a good culinary degree without having to do any cooking? What is a French onion tart recipe? What is a quiche’s sophisticated cousin, but easier to make? Think caramelized onions, a creamy filling, all nestled in buttery crust. Is it the kind of recipe that makes you feel like you’ve transported yourself to a Parisian? Even if you’re just chilling in your kitchen with a messy bun, you can still enjoy bbq. What is the aroma of French onion tart? I promise it will become a family favorite.

French Onion Tart Recipe final dish beautifully presented and ready to serve

What is French onion tart?

Imagine the comforting flavors of French onion soup, but instead of ladling it into a bowl, you’re serving it to someone else. How do you cradle it in a delectable pastry crust? What is French onion tart recipe? Sweet, deeply caramelized onions are the star of the show, simmered until they reach that perfect perfect temperature. Is there a golden-brown hue and melt-in It’s essentially a savory tart with rich custard-like filling, complemented by the sharpness of the tart. What is Gruyère What is the kind of dish that’s both elegant enough for a dinner party and comforting enough to eat at home? What is a good

Why you’ll love this recipe?

Okay, I have so many reasons why you’re going to adore this French Onion Tart Recipe, but I’ll try to keep it concise.
First off, the What are some outrageous flavor combinations?. The sweet, savory, and umami-rich combination is simply irresistible. Think deeply caramelized onions mingling with creamy custard and nutty Gruyère cheese. Is it a flavor explosion in every bite?What is surprisingly simpleSeriously, don’t let the “tart” part intimidate you. Is this an overly complicated pastry project? I always use store-bought crust to save time (don’t tell the French! ), and the filling comes together in minutes. Thirdly, it’s easy to make.cost-effective. Onions are cheap, and the other ingredients are pantry staples. You’re getting a gourmet-level dish without breaking the bank, and that’s always a win in my book.

Finally, it’s versatileCan you serve it warm, cold, or at room temperature? What are the best Sunday I love having a slice of bread for lunch. I like it with salad. What I love most about this French Onion Tart Recipe is how incredibly satisfying it is. It hits all the right notes – savory, sweet, creamy, and crunchy. I always get rave reviews for this recipe. What’s a good way to use up those extra onions that are always lurking in the back of my fridge? What is it like to eat my grandma’s food? What are some good French recipes for ratatouille?

How do I make French onion tart?

Quick Overview

How do you make a French onion tart? How do you caramelize onions? Is it worth it? Then, you’ll whisk together the creamy filling, pour it into a pre-baked crust, top with Gruyère. Is it safe to bake cheese, and bake until golden and bubbly? Is this really simpler than it sounds? What is the most important thing to remember when caramelizing onions? What is the secret to flavor explosion?

Ingredients

For the Tart Crust:
– 1 (9-inch) store-bought pie crust or homemade pastry (I always cheat and buy store-bought, no shame!)
– 1 egg, lightly beaten (for egg wash, optional)

For the Caramelized Onions:
– 2 tablespoons olive oil (good quality makes a difference here) – 3 large yellow onions, thinly sliced. Is yellow onion the sweetest and caramelize the best? ) – 1 teaspoon granulated sugar (helps with the caramelization process) 1/2 teaspoon dried thyme (Fresh is even better if you have it! ) – 1/4 cup dry white wine (like Sauvignon Blanc or Pinot Grigio, optional, but adds a lovely depth to the wine). Is chicken broth good for cooking?

For the Filling:
– 1 1/2 cups heavy cream (don’t skimp on the fat here! ) – 3 large eggs (gives it that lovely custard texture) 1/4 teaspoon ground nutmeg (adds a subtle flavor) (I like it with whipped cream) – 1 cup grated Gruyère cheese (this cheese melts beautifully and has a nutty flavor, but you can’t go wrong with it). Can substitute Swiss or Emmental if needed)

French Onion Tart Recipe ingredients organized and measured on kitchen counter

How do I follow the

Step 1: Preheat & Prep Pan

Preheat your oven to 375°F (190°C). If you’re using store-bought crust, remove it from the packaging and place it in a 9-inch tart pan. With a removable bottom. I love the removable bottom because it makes serving so much easier!). Is it necessary to prick the bottom of the crust with a fork to prevent it from puffing up during baking? What is called “docking”?

Step 2: Blind Bake the Crust

If you have a pie weight, line the crust with parchment paper and fill it with dried beans (this prevents the filling of the pie) (line the bottom of your pie with tin foil). What causes crust to shrink? Bake for 15 minutes. Then, remove the parchment paper and weights and bake for another 5-7 minutes, or until the crust is firm. Is it light golden If you want a golden crust, brush it with the egg wash before this second bake. What is the best way to prevent a soggy bottom?

Step 3: Caramelize the Onions

While the crust is baking, start caramelizing the onions. In a large skillet, heat olive oil over medium heat. Add garlic and cook for 5 minutes. Set aside. Add the sliced onions, sugar, thyme, salt, and pepper. Mix well. Cook, stirring occasionally, for about 30-40 minutes, or until the onions are deeply golden brown. What is caramelized? Patience is the key here! Don’t rush the process, as this is where the magic happens. If the onions stick to the pan, add a tablespoon of water or broth to deglaze.

Step 4: Deglaze with Wine (Optional)

If using, pour the white wine into a skillet and cook for another 2-3 minutes, scraping up any crumbs. Is there a way to remove browned bits from the bottom of the pan? What is the best way to add flavor to a dish? If you don’t have wine on hand, chicken broth works just as well!

Step 5: Prepare the Filling

In a medium bowl, whisk together the heavy cream, eggs, salt, and pepper. Set aside. Make sure everything is well combined and smooth. I sometimes add a pinch of cayenne pepper to my smoothies. I like it!

Step 6: Assemble the Tart

Once the crust is pre-baked, spread the caramelized onions evenly over the bottom. Pour the cream mixture over the onions. Sprinkle the grated Gruyère cheese evenly over top. Don’t be shy with cheese, it creates that bubbly topping!

Step 7: Bake

Bake the tart in the preheated oven for 25-30 minutes, or until the filling is set and the cheese is melted. Golden brown and bubbly. To check for doneness, gently jiggle the tart. The filling should be set around the edges but still have a slight wiggle in the center. Don’t overbake it, or the filling will become tough.

Step 8: Cool & Serve

How do you remove a tart from the oven and let it cool in the pan for at least 15-20 minutes before serving? If you wish to serve a filling warm or at room temperature, please do so. I like to garnish it with fresh thyme or a drizzle of balsamic glaze for extra flavor. What is the best way

What should I serve it with?

What are some of the best French onion tart recipes? Depending on the occasion.For Brunch:Serve it alongside a simple green salad with olive oil. What’s a good compliment for sips of white wine? What are some of the best brunch spreads?For Lunch:A slice of this tart is delicious with a bowl of tomato soup or lentil soup. What are some of the best midday meals?For Dinner: Serve it as an appetizer before a main course of roasted chicken or grilled steak. A side of roasted asparagus or green beans would round out the meal nicely.

For a Casual Snack:How do you serve a tart with coffee or tea? What are some comforting treats for kids after school? What are some good tarts for a potluck? It’s easy to transport and can be served at room temperature, making it a convenient and convenient food. What are some crowd- What are some good side dishes to serve with cheese and charcuterie?

How do I make a French onion tart?

How do I make French onion tart recipe? Is it possible to be perfect everyOnion CaraWhat is the secret to a delicious tart? Cook them low and slow, stirring occasionally, until they are deeply golden brown and sweet. Is it worth it to do this for 40 minutes? I’ve found that adding a pinch of baking soda during caramelization can help them brown faster and I haven’t tried it myself.Crust Perfection:For a crispy crust, blind bake it before adding the filling. This prevents the bottom from becoming soggy. Use pie weights or dried beans to keep the crust from puffing up during baking. I always dock the crust with a fork to release any trapped air.Cheese Choice:What is the best Gruyère cheese for a tart? I’ve even used a combination of Gruyère and Parmesan for extra flavor. Just make sure the cheese is finely grated so it melts evenly.Filling Consistency: For a creamy filling, use heavy cream and whisk the eggs and cream together until smooth. Don’t over-whisk, as this can cause the filling to become tough. I sometimes add a tablespoon of sour cream or crème fraîche to the filling for extra richness.

Baking Time: Keep a close eye on the tart while it’s baking. The filling should be set around the edges but still have a slight wiggle in the center. If the crust starts to brown too quickly, cover it with foil.

Serving Suggestions: Let the tart cool for at least 15 minutes before serving. This allows the filling to set completely. Garnish with fresh thyme or a drizzle of balsamic glaze for extra flavor and presentation. Sometimes, I sprinkle a little sea salt on top just before serving to enhance the sweetness of the onions. This recipe can easily be adapted for different dietary needs. You can use a gluten-free crust or substitute the heavy cream with coconut cream for a dairy-free version. I’ve also added other vegetables to the filling, such as sautéed mushrooms or spinach, for extra nutrition. Just be sure to adjust the baking time accordingly.

Storing and Reheating Tips

This French Onion Tart Recipe is fantastic for making ahead of time, and it stores well in both the refrigerator and the freezer. Here’s how to properly store and reheat it to maintain its flavor and texture:
Room Temperature: If you plan to serve the tart within a few hours, you can leave it at room temperature. Cover it loosely with plastic wrap or foil to prevent it from drying out. I usually don’t leave it out for more than 2-3 hours.

Refrigerator Storage: To store the tart in the refrigerator, let it cool completely. Then, wrap it tightly in plastic wrap or place it in an airtight container. It will keep in the refrigerator for up to 3-4 days. I always try to consume it within this timeframe for the best quality.

Freezer Instructions: For longer storage, you can freeze the tart. Let it cool completely, then wrap it tightly in plastic wrap and then in foil. Alternatively, you can slice the tart into individual portions, wrap each slice separately, and freeze them in a freezer-safe bag. It will keep in the freezer for up to 2-3 months. Make sure to label the bag with the date, so you know when you froze it.

Reheating Instructions: To reheat the tart, preheat your oven to 350°F (175°C). If frozen, thaw it in the refrigerator overnight before reheating. Place the tart on a baking sheet and bake for 15-20 minutes, or until it is heated through. If the crust starts to brown too quickly, cover it with foil. You can also reheat individual slices in the microwave for a quick snack. Just be aware that the crust may not be as crispy. I prefer using the oven for reheating to maintain the best texture.

Glaze Timing Advice: If you plan to glaze the tart with balsamic glaze, do so just before serving for the best flavor and presentation. The glaze can become sticky if stored for too long.

Frequently Asked Questions

Can I make this gluten-free?
Absolutely! You can easily adapt this recipe to be gluten-free by using a gluten-free pie crust. There are many great store-bought options available, or you can make your own using a blend of gluten-free flours. Just be sure to check the baking time, as gluten-free crusts may require slightly longer to bake. I’ve had success with almond flour crusts too, which add a nice nutty flavor!
Do I need to peel the onions?
Yes, you definitely need to peel the onions before slicing them. The outer layer of the onion can be tough and papery, and it won’t caramelize properly. Peeling the onions ensures that they cook evenly and have a smooth, sweet flavor. I always start by cutting off the top and bottom of the onion, then slicing it in half and peeling off the outer layers.
Can I make this as mini tarts instead?
Definitely! This recipe works great as mini tarts. Simply use a muffin tin or mini tart pans and press the crust into each one. Fill with the caramelized onion mixture and bake for a shorter time, about 15-20 minutes, or until the filling is set and the cheese is golden brown. Mini tarts are perfect for parties or individual servings. I like to make them for appetizers at holiday gatherings.
How can I adjust the sweetness level?
The sweetness of the tart comes primarily from the caramelized onions. If you prefer a less sweet tart, you can reduce the amount of sugar added during caramelization or use a different type of onion, such as Vidalia, which is naturally sweeter. You can also balance the sweetness with a pinch of salt or a squeeze of lemon juice. I find that adding a touch of balsamic vinegar during the last few minutes of caramelization also helps to cut through the sweetness.
What can I use instead of Gruyère cheese?
If you don’t have Gruyère cheese on hand, you can substitute it with Swiss, Emmental, or even a sharp cheddar. Swiss and Emmental have a similar nutty flavor to Gruyère, while sharp cheddar will add a bit more tang. You can also use a combination of cheeses for a more complex flavor. I’ve even used fontina, which melts beautifully and has a creamy texture.

Final Thoughts

French Onion Tart Recipe slice on plate showing perfect texture and swirl pattern

This French Onion Tart Recipe is more than just a dish; it’s an experience. It’s the aroma of caramelized onions filling your kitchen, the creamy, savory filling melting in your mouth, and the satisfaction of creating something truly special. I hope this recipe brings as much joy to your kitchen as it has to mine. And if you’re a fan of savory tarts, be sure to check out my other recipes for spinach and feta tart or roasted vegetable tart – they’re equally delicious and easy to make! Happy baking, and I can’t wait to hear how yours turns out! Please feel free to leave a comment below with your own variations or tips – I love hearing from you all!

French Onion Tart Recipe

A savory French onion tart with a flaky crust and a rich, caramelized onion filling.
Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Course Breakfast
Cuisine American
Servings 6
Calories 120 kcal

Ingredients
  

Main Ingredients

  • 1 package refrigerated pie crust
  • 3 cups thinly sliced yellow onions
  • 4 tablespoons butter
  • 2 tablespoons all-purpose flour
  • 1 cup chicken broth
  • 1 teaspoon dried thyme
  • 0.5 teaspoon salt
  • 0.25 teaspoon black pepper
  • 1 cup shredded Gruyere cheese

Instructions
 

Preparation Steps

  • Preheat oven to 375°F (190°C).
  • Melt butter in a large skillet over medium heat. Add onions and cook until caramelized, about 30 minutes.
  • Stir in flour, chicken broth, thyme, salt, and pepper. Bring to a simmer and cook until thickened, about 5 minutes.
  • Roll out pie crust and place in a tart pan. Pour onion mixture into crust. Top with Gruyere cheese.
  • Bake for 30-35 minutes, or until crust is golden brown and filling is bubbly.

Notes

Serve warm. Enjoy!

Nutrition

Serving: 200gCalories: 120kcalCarbohydrates: 120gProtein: 120gFat: 120gSaturated Fat: 120gPolyunsaturated Fat: 120gMonounsaturated Fat: 120gTrans Fat: 120gCholesterol: 120mgSodium: 120mgPotassium: 120mgFiber: 120gSugar: 120gVitamin A: 120IUVitamin C: 120mgCalcium: 120mgIron: 120mg
Tried this recipe?Let us know how it was!

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