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Decadent Caramelized Onion Butternut Squash Tart Recipe

Published: Nov 24, 2025 by Emma Saviani ·

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As the kitchen fills with the sweet aroma of roasting butternut squash and caramelized onions, I can’t help but feel transported to a cozy autumn day, no matter the season. This Caramelized Onion Butternut Squash Tart is a delightful way to elevate a simple gathering into something truly special. Not only is this recipe a breeze to prepare, but it also combines comforting ingredients that everyone loves, making it a sure-fire crowd-pleaser. The flaky puff pastry brings it all together, giving each bite a satisfying crunch that pairs perfectly with the creamy goat cheese and tender veggies. Whether you're hosting friends or simply treating yourself to a homemade dinner, this tart is bound to impress! Are you ready to transform your next meal with these delectable layers?

Caramelized Onion Butternut Squash Tart

Why is this tart a must-try?

Irresistible Aroma: As you bake, the sweet scent of caramelized onions and roasted butternut squash fills your kitchen, creating a warm, inviting atmosphere.

Flaky Perfection: The puff pastry provides a delightful crunch, perfectly complemented by the creamy goat cheese and tender veggies.

Crowd-Pleasing Delight: This tart captivates both guests and family, making it a great addition to any gathering or a cozy night in.

Versatile Base: Feel free to switch up ingredients; try different cheeses or add seasonal veggies for a personal touch!

Quick and Easy: With just an hour from start to finish, you can whip up this delicious dish without feeling rushed. Cooking has never been so satisfying!

For those interested in more comforting recipes, check out our Easy Vegetarian Tarts for additional inspiration.

Caramelized Onion Butternut Squash Tart Ingredients

For the Tart Base
• Puff pastry – It can be store-bought for convenience or homemade for a personal touch.

For the Filling
• Butternut squashes – Provides a sweet and nutty flavor when roasted.
• Onions – Caramelize them for a deep, sweet taste that mingles beautifully with the squash.
• Olive oil – Helps in roasting the vegetables and adds richness.
• Salt – Enhances the natural flavors of the ingredients.
• Black pepper – Adds a hint of warmth to the tart.
• Fresh thyme – A lovely herb that complements the sweet squash and savory onions.

For the Cheese and Cream
• Goat cheese – Adds creaminess with a tangy kick, or use feta cheese for a sharper flavor.
• Heavy cream – Helps to bind the filling together, creating a luscious texture.

For the Egg Wash
• Egg – Brush on the pastry for a beautiful golden finish.

Optional Kick
• Red pepper flakes – A sprinkle for those who enjoy a bit of heat in their dish.

This Caramelized Onion Butternut Squash Tart is the perfect dish to prepare when you want to impress without the stress!

Step‑by‑Step Instructions for Caramelized Onion Butternut Squash Tart

Step 1: Preheat the Oven
Begin by preheating your oven to 400°F (200°C). This ensures a perfect baking environment for your Caramelized Onion Butternut Squash Tart, allowing the puff pastry to rise beautifully and the vegetables to roast to perfection.

Step 2: Roast the Squash
In a large bowl, toss the diced butternut squash with olive oil, salt, and black pepper until well coated. Spread the seasoned squash evenly on a baking sheet and roast in the preheated oven for 25-30 minutes or until tender and caramelized, stirring halfway through for even cooking.

Step 3: Caramelize the Onions
While the squash roasts, heat a skillet over medium heat and add a tablespoon of olive oil. Add the sliced onions and cook, stirring occasionally, for about 20 minutes. You'll know they are ready when they are golden brown and have a sweet aroma, creating a lovely base for the tart.

Step 4: Prepare the Puff Pastry
On a lightly floured surface, roll out the puff pastry into a rectangle that fits your tart pan. Use a fork to prick the bottom evenly, which helps prevent bubbles from forming during baking. This will create a stable foundation for your Caramelized Onion Butternut Squash Tart.

Step 5: Assemble the Tart
Spread the caramelized onions evenly over the puff pastry, followed by the roasted butternut squash. Crumble the goat cheese generously over the top, then drizzle with heavy cream and sprinkle fresh thyme for an aromatic touch. This layering infuses vibrant flavors into your tart.

Step 6: Bake the Tart
Carefully place the assembled tart in the preheated oven and bake for 25-30 minutes. Keep an eye on it; you're looking for a golden brown crust and a bubbling filling that signals it’s ready to be enjoyed.

Step 7: Cool and Serve
Once baked, allow the Caramelized Onion Butternut Squash Tart to cool for about 10 minutes on a wire rack. This resting period helps it set a little, making slicing easier. Then, cut into slices and serve warm, indulging in the delightful layers of flavor you’ve created!

Caramelized Onion Butternut Squash Tart

How to Store and Freeze Caramelized Onion Butternut Squash Tart

Room Temperature: Let the tart cool completely before storing. It can be kept at room temperature for up to 2 hours; after that, refrigerate to maintain freshness.

Fridge: Store leftover tart wrapped tightly in plastic wrap or in an airtight container for up to 3 days. Reheat in the oven at 350°F (175°C) for 10-15 minutes to revive its flaky texture.

Freezer: To freeze, wrap slices of the Caramelized Onion Butternut Squash Tart individually in plastic wrap, then place them in a freezer-safe bag. It will maintain quality for up to 2 months.

Reheating: For best results, thaw in the fridge overnight and reheat slices in the oven until warm, ensuring the crust stays crisp and delicious.

What to Serve with Caramelized Onion Butternut Squash Tart

Create a delightful dining experience by pairing this tart with complementary dishes that enhance its rich flavors.

  • Mixed Green Salad: A refreshing blend of greens dressed in a light vinaigrette balances the tart’s richness while providing a crunchy texture.
  • Roasted Brussels Sprouts: Their slightly bitter flavor and crispiness counteract the creamy fillings and add an earthy tone to the meal. Consider adding some balsamic glaze for a sweet touch!
  • Creamy Potato Gratin: This dish brings a comforting side of cheesy potatoes that will have everyone coming back for seconds. The creamy texture enhances the homey vibe of your meal.
  • Herbed Quinoa: Light and fluffy, herbed quinoa provides a nutty, wholesome side that complements the tart without overshadowing its flavors, making for a deliciously healthy option.
  • Savory Apple Chutney: Add a spoonful of this tangy-sweet chutney on the side for a delightful contrast that will elevate each bite.
  • Crisp White Wine: A chilled Sauvignon Blanc pairs beautifully, enhancing the tart's flavors while cutting through the creaminess with its zesty notes.
  • Pumpkin Spice Cheesecake: For dessert, this rich cheesecake carries warm flavors that echo the season, finishing your meal on a sweet note.
  • Garlic Breadsticks: Their chewy texture and buttery garlic flavor make for the perfect vehicle to savor every crumb of tart filling, adding a comforting touch to your dining experience.

Make Ahead Options

These Caramelized Onion Butternut Squash Tart preparations are perfect for busy home cooks looking to save time during the week! You can roast the butternut squash and caramelize the onions up to 3 days in advance, refrigerating them in airtight containers to preserve their flavors and textures. Additionally, you can roll out the puff pastry and store it in the refrigerator for up to 24 hours. When you're ready to assemble and bake, simply combine the prepped ingredients by layering the roasted squash and onions over the pastry, followed by the cheese and cream, and bake as directed. This way, you’ll have a delightful homemade tart ready to impress with minimal last-minute effort!

Caramelized Onion Butternut Squash Tart Variations

Feel free to get creative with your tart; these variations will help you tailor the flavors to your liking!

  • Dairy-Free: Replace goat cheese and heavy cream with a plant-based cheese and coconut cream for a creamy yet dairy-free option.
  • Spicy Kick: Add chopped jalapeños or a sprinkle of crushed red pepper flakes to the onions for a piquant twist. Heat lovers will enjoy the contrast!
  • Different Veggies: Swap butternut squash for sweet potatoes or zucchini, encouraging seasonal variations. Each will impart its unique flavor profile to the tart.
  • Herbed Twist: Experiment with herbs by including rosemary or sage instead of thyme, bringing an aromatic, earthy taste to every bite.
  • Nutty Crunch: Scatter some toasted pine nuts or walnuts over the top before baking for a delightful crunch and an added layer of texture.
  • Caramelized Garlic: Incorporate roasted garlic with the caramelized onions for a rich, savory depth, transforming the flavor landscape beautifully.
  • Cheese Swap: If goat cheese isn’t your favorite, try ricotta or a sharp cheddar for different creamy textures and flavors. It’s amazing how cheese choices elevate the dish!
  • Puff Pastry Alternatives: Use a different crust like a whole grain or gluten-free alternative if you're looking for a healthier option without sacrificing taste.

These variations not only ensure that you enjoy your Caramelized Onion Butternut Squash Tart in many delightful ways, but they also help tailor the dish to your guests' tastes or dietary preferences. For more inspiration on culinary creativity, check out our Easy Vegetarian Tarts and discover even more delicious recipes!

Expert Tips for Caramelized Onion Butternut Squash Tart

• Quality Puff Pastry: Choose high-quality puff pastry for the best flaky texture. If making your own, let it rest adequately before rolling to ensure it puffs nicely.

• Even Roasting: Cut butternut squash into uniform pieces for even roasting. This ensures that every piece caramelizes beautifully without some being mushy while others are still hard.

• Perfect Onions: Stir the onions occasionally while caramelizing, and don't rush the process. Low and slow is key to achieving that deep, sweet flavor.

• Layering Flavors: Don’t hesitate to incorporate other herbs or veggies like spinach or mushrooms for extra depth in your Caramelized Onion Butternut Squash Tart.

• Cooling Time: Allow the tart to cool for at least 10 minutes before slicing to help maintain its shape and prevent the filling from spilling out.

These tips will ensure your Caramelized Onion Butternut Squash Tart turns out as delightful as it sounds!

Caramelized Onion Butternut Squash Tart

Caramelized Onion Butternut Squash Tart Recipe FAQs

How do I choose the right butternut squash?
Absolutely! Look for butternut squashes that are heavy for their size with smooth, unblemished skin. The ideal squash should feel firm, and you want to avoid any with soft spots or dark blemishes. The skin should be tan, not overly green.

What is the best way to store the tart?
After it’s completely cool, wrap any leftovers in plastic wrap or place them in an airtight container. In the fridge, your Caramelized Onion Butternut Squash Tart will stay fresh for up to 3 days. When reheating, pop it in the oven at 350°F (175°C) for about 10-15 minutes to crisp up the pastry once again.

Can I freeze leftovers of the Caramelized Onion Butternut Squash Tart?
Yes, you can! To freeze, first slice the tart and wrap each slice in plastic wrap individually. Then, place the wrapped slices in a freezer-safe bag. Be sure to label it! Your tart can be frozen for up to 2 months. When you're ready to enjoy it, thaw overnight in the fridge and reheat in the oven to regain that lovely flaky texture.

What should I do if my onions aren’t caramelizing properly?
If your onions aren’t caramelizing as desired, ensure you're cooking them on a low to medium heat, stirring occasionally. If they seem to be drying out, add a splash of water or a bit of olive oil. Patience is key! This can take about 20 minutes, so you want to allow enough time for the natural sugars to develop that sweet flavor.

Is this tart safe for people with dairy allergies?
For those with dairy allergies, you can easily modify the recipe! Substitute the goat cheese with a dairy-free cheese alternative and the heavy cream with a plant-based creamer or coconut milk. It’s important to check all packaging to ensure there are no hidden dairy ingredients, especially in the puff pastry!

Can pets have any part of this tart?
While the ingredients are generally safe for pets, the tart contains onion and cheese, which can be harmful to dogs and cats in larger quantities. It's best to keep this flavorful treat for yourself and avoid sharing it with your furry friends!

Caramelized Onion Butternut Squash Tart

Decadent Caramelized Onion Butternut Squash Tart Recipe

This Caramelized Onion Butternut Squash Tart is a delightful crowd-pleaser with comforting flavors and a flaky pastry.
Print Pin Rate
Course: Main Dishes
Cuisine: American
Keyword: Baking, Caramelized Onion Butternut Squash Tart, comfort food, fall recipes, tart, Vegetarian
Prep Time: 30 minutes minutes
Cook Time: 30 minutes minutes
Cooling Time: 10 minutes minutes
Total Time: 1 hour hour 10 minutes minutes
Servings: 8 slices
Calories: 280kcal

Equipment

  • Oven
  • Baking Sheet
  • Skillet
  • tart pan
  • Rolling Pin

Ingredients

For the Tart Base

  • 1 sheet Puff pastry Store-bought or homemade

For the Filling

  • 2 cups Butternut squash, diced Provides a sweet and nutty flavor when roasted
  • 1 medium Onion, sliced Caramelized for sweetness
  • 2 tablespoons Olive oil For roasting vegetables
  • 1 teaspoon Salt Enhances flavors
  • ½ teaspoon Black pepper Adds warmth
  • 1 tablespoon Fresh thyme Herb for added flavor

For the Cheese and Cream

  • 4 ounces Goat cheese Adds creaminess
  • ½ cup Heavy cream Binds filling together

For the Egg Wash

  • 1 large Egg For brushing on pastry

Optional Kick

  • ¼ teaspoon Red pepper flakes For added heat

Instructions

Preparation Instructions

  • Preheat your oven to 400°F (200°C).
  • In a large bowl, toss the diced butternut squash with olive oil, salt, and black pepper. Spread on a baking sheet and roast for 25-30 minutes, stirring halfway through.
  • In a skillet, heat olive oil over medium heat. Add sliced onions and cook for about 20 minutes until golden brown.
  • Roll out the puff pastry on a floured surface and prick the bottom with a fork.
  • Spread caramelized onions over the pastry, then add roasted butternut squash, crumbled goat cheese, drizzle with heavy cream, and sprinkle with thyme.
  • Bake the assembled tart for 25-30 minutes until golden brown and bubbly.
  • Allow the tart to cool for about 10 minutes before serving.

Notes

Allowing the tart to cool for a bit helps maintain its shape when slicing.

Nutrition

Serving: 1slice | Calories: 280kcal | Carbohydrates: 30g | Protein: 6g | Fat: 15g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Cholesterol: 50mg | Sodium: 350mg | Potassium: 250mg | Fiber: 3g | Sugar: 4g | Vitamin A: 4500IU | Vitamin C: 15mg | Calcium: 60mg | Iron: 1.5mg

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Ellie Monroe

I’m Ellie, a 54-year-old home cook who believes the best recipes come from the heart. At Heavenly Recipe, I share comforting classics, sweet treats, and simple meals that anyone can make, just like the ones passed down through my family.

More about me

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