Name: Caramelized Onion Butternut Squash Tart: A Seasonal Delight
Prep time: 20 min
Cook time: 45 min
Total time: PT-491287H1M18S
Cuisine: French
Ingredients: 1 sheet puff pastry, thawed; 2 cups butternut squash, cubed; 1 tbsp olive oil; 1/2 tsp salt; 1/4 tsp black pepper; 2 medium onions, thinly sliced; 1 tbsp butter; 1 tsp balsamic vinegar; 1/2 cup ricotta cheese; 1/4 cup grated Parmesan cheese; 1/2 cup shredded Gruyère or mozzarella cheese; 1 tsp fresh thyme leaves; 1 egg, beaten (for egg wash)

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Tired of serving the same boring side dishes that leave your guests unimpressed and your taste buds craving something more exciting?

This Caramelized Onion Butternut Squash Tart transforms simple autumn ingredients into an elegant centerpiece that will have everyone asking for the recipe – tender, sweet butternut squash paired with golden caramelized onions in a flaky, buttery crust.

Hi there! I’m Alexandra, a 38-year-old self-taught chef who spent years perfecting seasonal tarts after countless kitchen experiments. I remember my first attempt at this Caramelized Onion Butternut Squash Tart I burned the onions and undercooked the squash! But through trial and error, I discovered the perfect balance of sweetness, savory depth, and that irresistible golden crust. My passion for cooking grew from these very moments of learning, and now I’m excited to share this foolproof recipe that has become a staple at my dinner table.

In this guide, you’ll discover the secret to perfectly caramelized onions, how to select the best butternut squash, essential prep techniques that save time, and my tried-and-tested cooking methods that guarantee a stunning tart every time.

Why This Caramelized Onion Butternut Squash Tart Recipe Works

This recipe focuses on flavor harmony, seasonal convenience, and impressive versatility that works for any occasion.

• Uses affordable, easy-to-find seasonal ingredients – butternut squash and onions are budget-friendly and available year-round
• Prep ahead friendly – assemble in 30 minutes and bake when needed for maximum convenience
• Perfect for weeknight dinners or elegant weekend entertaining – impressive enough for guests, simple enough for family meals

Choosing the Right Ingredients for Your Caramelized Onion Butternut Squash Tart

Best Butternut Squash Selection

Choose medium-sized butternut squash with firm, unblemished skin and a matte finish. The neck should feel heavy for its size, indicating dense, sweet flesh perfect for this Caramelized Onion Butternut Squash Tart.

Buying Tips for Perfect Results

Look for butternut squash with a deep tan color and avoid any with soft spots or green tinges. For onions, select yellow or sweet onions that feel firm and have papery, dry outer skins.

Smart Substitutions

Swap butternut squash for delicata squash or sweet potatoes. Replace yellow onions with shallots for a milder flavor, or use red onions for deeper color in your tart.

Ingredients & Prep for Caramelized Onion Butternut Squash Tart

Caramelized Onion Butternut Squash Tart: A Seasonal Delight

Essential Tart Prep Components

1 pre-made or homemade pastry crust
2 lbs butternut squash, peeled and cubed
3 large yellow onions, thinly sliced
3 eggs for custard base
1 cup heavy cream

Caramelization & Seasoning Blend

3 tablespoons olive oil for roasting
2 tablespoons butter for caramelizing onions
1 teaspoon fresh thyme leaves
½ teaspoon salt and black pepper
Pinch of nutmeg for warmth

Pantry Staples You’ll Need

Stock your kitchen with quality olive oil for roasting, butter for rich caramelization, and fresh herbs. A touch of balsamic vinegar enhances the onions’ natural sweetness.

Step-by-Step Cooking Instructions for Caramelized Onion Butternut Squash Tart

Pre-Cooking Prep for Your Caramelized Onion Butternut Squash Tart

Preheat oven to 400°F. Cube butternut squash into 1-inch pieces, slice onions uniformly thin, and bring your pastry crust to room temperature. Line your tart pan and prick the bottom with a fork.

Cooking Method for Perfect Caramelized Onion Butternut Squash Tart

Roast cubed butternut squash for 25-30 minutes until tender and lightly caramelized
Simultaneously, caramelize sliced onions in butter over medium-low heat for 20-25 minutes until golden brown
Whisk eggs, cream, thyme, salt, and pepper for the custard base
Layer caramelized onions and roasted squash in the pastry shell, pour custard over top

Doneness Check for Your Caramelized Onion Butternut Squash Tart

Bake at 375°F for 35-40 minutes until the center is just set and the top is golden brown. A knife inserted in the center should come out mostly clean.

Resting Your Caramelized Onion Butternut Squash Tart

Allow the tart to cool for 15-20 minutes before slicing. This resting period helps the custard set completely and makes for cleaner slices.

Pro Tips for Perfect Caramelized Onion Butternut Squash Tart

Avoiding Soggy Crust in Your Caramelized Onion Butternut Squash Tart

Pre-bake your pastry shell for 10 minutes with parchment and pie weights. Don’t rush the onion caramelization – low and slow prevents burning and develops deep, sweet flavors.

Essential Tool Recommendations for Caramelized Onion Butternut Squash Tart Success

Invest in a sharp chef’s knife for easy squash prep, a 9-inch tart pan with removable bottom, and a heavy-bottomed skillet for even caramelization.

Storage & Reheating Your Caramelized Onion Butternut Squash Tart

Store covered in refrigerator for up to 4 days. Reheat individual slices at 325°F for 10-12 minutes to restore the crispy crust texture.

Looking for more inspiring seasonal recipes? Visit my Pinterest page at pinterest for endless cooking inspiration and step-by-step photo guides that make every recipe foolproof!

Flavor Variations for Caramelized Onion Butternut Squash Tart

Herbaceous Twist

Add fresh sage leaves or rosemary to your Caramelized Onion Butternut Squash Tart for an earthy, aromatic depth that complements the sweet squash beautifully.

Vegetarian & Vegan Adaptations

Replace heavy cream with cashew cream or coconut milk, and use flax eggs instead of regular eggs for a completely plant-based version.

Global Flavors for Your Caramelized Onion Butternut Squash Tart

Incorporate Mediterranean flavors with sun-dried tomatoes and oregano, or try Middle Eastern spices like cinnamon and sumac for an exotic twist.

Variation	Key Ingredients	Prep Time	Flavor Profile
Classic Herb	Fresh thyme, sage	+5 minutes	Earthy, traditional
Mediterranean	Sun-dried tomatoes, oregano	+10 minutes	Bright, savory
Spiced	Cinnamon, nutmeg, paprika	+5 minutes	Warm, exotic
Vegan	Cashew cream, flax eggs	+15 minutes	Creamy, plant-based

Serving Suggestions for Caramelized Onion Butternut Squash Tart

Pair your tart with crisp arugula salad dressed in lemon vinaigrette, or serve alongside my Greek-Style Lemon Potatoes for a complete seasonal meal. For dessert, try my Baked Pears to continue the autumn theme.

Complete the experience with sparkling apple cider or a crisp white grape juice for a festive, family-friendly beverage pairing that enhances the tart’s natural sweetness.

FAQs About Caramelized Onion Butternut Squash Tart

Can I make this Caramelized Onion Butternut Squash Tart ahead of time?
Yes! Assemble the tart completely and refrigerate unbaked for up to 24 hours. Add 5-10 extra minutes to the baking time if cooking from cold.

How do I fix a soggy bottom crust?
Pre-bake your crust for 10 minutes with weights, and ensure your filling isn’t too wet. Pat roasted squash dry before adding to the tart shell.

Is this recipe suitable for freezing?
Absolutely! Wrap the cooled, baked tart tightly and freeze for up to 3 months. Thaw overnight and reheat at 325°F for best results.

Conclusion

Fire up your oven and create this stunning Caramelized Onion Butternut Squash Tart tonight your kitchen will smell absolutely incredible, and your family will be amazed by your culinary skills!

Ready for more seasonal inspiration? Try my Baked Pears recipe next for the perfect sweet ending to your autumn feast, or explore more of my tested recipes for year-round cooking success!

Caramelized Onion Butternut Squash Tart: A Seasonal Delight