Roasted Butternut Squash & Caramelized Onion Tart with Brie, Cranberries & Maple Pecans

There are certain recipes that make the whole kitchen smell like a celebration, and this Roasted Butternut Squash & Caramelized Onion Tart with Brie, Cranberries & Maple Pecans is one of them.

I love making this kind of tart when the weather starts getting cooler and I want something that feels a little special without making an entire complicated dinner. The first time I made it, I had roasted butternut squash in the oven, onions slowly turning golden in a skillet, and a sheet of puff pastry waiting on the counter.

Then I added Brie.

That creamy cheese melting into the warm squash and sweet onions was already wonderful. But once the tart came out of the oven, I scattered over tart dried cranberries and maple-coated pecans, and suddenly it looked like something I’d planned for a holiday table weeks in advance.

I hadn’t.

That’s one of the things I love most about this recipe. It looks impressive, but the individual steps are surprisingly simple.

You get crisp, buttery pastry, tender caramelized squash, silky onions, creamy Brie, chewy cranberries, and crunchy maple pecans in every bite.

It is sweet and savory, creamy and crisp, soft and crunchy—all at once.

Why You’ll Love This Tart

• 🍂 Perfect for fall and winter entertaining
• 🧅 Deeply caramelized onions add incredible savory sweetness
• 🎃 Roasted butternut squash becomes tender and beautifully caramelized
• 🧀 Brie melts into the filling for a rich, creamy finish
• 🍒 Cranberries add little bursts of tart sweetness
• 🌰 Maple pecans provide an irresistible crunchy topping
• 🥐 Store-bought puff pastry makes the recipe much easier
• ✨ Beautiful enough for a holiday table
• 🥗 Delicious as a vegetarian main course or elegant side dish

The combination of squash and caramelized onions is a classic savory-tart pairing, while Brie, cranberries, pecans, and maple bring a festive sweet-savory contrast.

Ingredients

For the Tart

• 1 sheet frozen puff pastry, thawed
• 3 cups peeled and cubed butternut squash, cut into about 1/2-inch cubes
• 2 large yellow onions, thinly sliced
• 2 tablespoons olive oil, divided
• 1 tablespoon butter
• 1 teaspoon fresh thyme leaves
• 1/2 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 1/2 teaspoon garlic powder
• 5–6 ounces Brie cheese, cut into small pieces
• 1 large egg
• 1 tablespoon water

For the Cranberry Topping

• 1/3 cup dried cranberries
• 1 tablespoon orange juice
• 1 teaspoon orange zest
• 1 tablespoon maple syrup

For the Maple Pecans

• 3/4 cup pecan halves, roughly chopped
• 1 tablespoon maple syrup
• 1 tablespoon butter
• Pinch of salt
• 1/4 teaspoon cinnamon

For Finishing

• Fresh thyme
• Flaky sea salt, optional
• Extra maple syrup, optional

How to Make Roasted Butternut Squash & Caramelized Onion Tart

1. Roast the Butternut Squash

Start by preheating your oven to 400°F (200°C).

Line a large baking sheet with parchment paper.

Place the cubed butternut squash on the sheet and toss with:

• 1 tablespoon olive oil
• Salt
• Black pepper
• Garlic powder

Spread the squash into a single layer.

Don’t crowd the pan too much. Giving the pieces a little room allows the edges to roast instead of simply steaming.

Roast for approximately 25–30 minutes, turning once halfway through.

You’re looking for tender squash with lightly browned, caramelized edges.

Roasting the squash first concentrates its flavor and gives the tart much more depth than simply adding raw squash to the pastry. Roasted squash is commonly used in savory tart recipes for exactly this reason.

Set the squash aside when finished.

2. Slowly Caramelize the Onions

While the squash is roasting, heat the remaining tablespoon of olive oil and the butter in a large skillet over medium-low heat.

Add the sliced onions and a small pinch of salt.

Cook slowly for about 25–35 minutes, stirring every few minutes.

At first, the onions will look like an enormous pile.

Don’t worry.

They shrink dramatically as they cook.

Continue cooking until they’re soft, deeply golden, and jammy.

If the onions begin sticking or browning too quickly, lower the heat and add a tablespoon of water.

This is not the place to rush.

Slowly cooked onions develop the deep sweet-savory flavor that makes this tart so special. Caramelized onions are also a classic component of squash tarts.

Stir in the fresh thyme during the final minute.

Remove from the heat.

3. Prepare the Puff Pastry

While the filling cools slightly, place the thawed puff pastry on a parchment-lined baking sheet.

Gently roll it out just enough to smooth any creases.

Using a sharp knife, lightly score a 1/2-inch border around the edge without cutting all the way through.

Then prick the center several times with a fork.

This helps create a defined, beautifully puffed border while keeping the center from rising too dramatically.

Brush the outer border with the beaten egg mixed with water.

4. Layer the Onions

Spread the caramelized onions evenly across the center of the pastry.

Keep them inside the scored border.

The onions should form a thin, even layer rather than one huge mound.

5. Add the Roasted Squash

Scatter the roasted butternut squash over the onions.

Try to distribute it evenly so every slice gets a little squash.

I like leaving some of the golden edges visible because it makes the finished tart look especially pretty.

6. Add the Brie

Dot pieces of Brie over the squash.

You don’t need to remove the rind unless you personally dislike it. Brie rind is edible, and leaving it on helps keep the preparation quick and easy.

As the tart bakes, the Brie melts into the squash and onions, creating creamy pockets of cheese throughout.

And this is the moment when I usually start getting impatient.

Because once the Brie hits the warm squash, you know you’re very close to something delicious.

7. Bake the Tart

Place the tart in the 400°F oven and bake for approximately 20–25 minutes.

The pastry should be:

• Golden brown
• Crisp around the edges
• Puffy along the border

The Brie should be melted and soft.

If the pastry is browning too quickly before the center is hot, reduce the oven temperature to 375°F for the final few minutes.

8. Make the Cranberry Topping

While the tart bakes, place the dried cranberries, orange juice, orange zest, and maple syrup in a small saucepan.

Warm over low heat for about 2–3 minutes, just until the cranberries soften slightly and become glossy.

Don’t boil them.

You’re simply waking up their flavor and giving them a beautiful little maple-orange coating.

Set aside.

9. Make the Maple Pecans

Place the chopped pecans in a small skillet over medium-low heat.

Add the butter, maple syrup, cinnamon, and salt.

Cook for about 3–5 minutes, stirring frequently.

The pecans should become fragrant and lightly toasted, with a thin maple coating.

Watch them carefully.

Pecans can go from perfectly toasted to burnt surprisingly quickly.

Transfer them to a plate lined with parchment and let them cool for a few minutes.

They’ll become crunchier as they cool.

10. Finish the Tart

Remove the tart from the oven and let it cool for about 5 minutes.

Scatter the maple pecans and cranberries over the top.

Finish with fresh thyme and, if you like, a tiny pinch of flaky sea salt.

For an extra festive touch, drizzle the tiniest amount of maple syrup over the finished tart.

Then slice and serve.

The Secret to Perfect Caramelized Onions

If there is one part of this recipe worth being patient with, it’s the onions.

You want them deep golden brown and soft, not merely softened.

Keep the heat relatively low and stir occasionally.

The natural sugars in the onions gradually caramelize, creating a rich flavor that balances the earthy sweetness of the squash and the creamy Brie.

If you rush the process with high heat, the outside can burn before the onions become tender and jammy.

So put on some music, make yourself a cup of coffee, and let the onions do their thing.

It’s worth it.

Don’t Make the Tart Too Wet

This is especially important when working with puff pastry.

Your roasted squash should have browned edges rather than being watery.

Your caramelized onions should be cooked until most excess moisture has disappeared.

And if your Brie is particularly soft, don’t pile on too much.

The goal is a flaky, crisp pastry base, not a soggy one.

A Little Trick for Extra-Crispy Pastry

If you have time, place the assembled tart in the refrigerator for 10–15 minutes before baking.

Starting with chilled pastry can help the butter in the puff pastry stay firm long enough to create better lift and crispness in the oven.

Can I Use Homemade Pastry?

Absolutely.

A homemade pie crust would give the tart a sturdier, more rustic texture.

But for entertaining, I usually reach for store-bought puff pastry.

It saves time and gives you that beautiful flaky, golden finish without requiring an afternoon of pastry-making.

Puff pastry is also commonly used for squash and Brie tart variations.

Easy Variations

Add Fresh Sage

Replace some of the thyme with fresh sage.

Sage and butternut squash are a classic combination.

Add Goat Cheese

Use a mixture of Brie and goat cheese for a tangier filling.

Add Bacon

For a non-vegetarian version, sprinkle cooked, crumbled bacon over the tart before adding the cranberries and pecans.

Use Walnuts

Don’t have pecans?

Chopped walnuts work beautifully with maple and squash.

Add Balsamic

A few drops of balsamic glaze over the finished tart add another layer of sweet-tangy flavor.

Don’t use too much—you want it to complement the Brie rather than overpower everything.

Make It More Savory

Skip the maple drizzle and increase the herbs.

You can also add a pinch of red pepper flakes to the onions.

Can I Make This Ahead?

Yes, and this is one of the reasons I love this tart for entertaining.

The butternut squash can be roasted and the onions caramelized up to 2 days ahead. Keep both refrigerated in separate airtight containers.

When you’re ready to bake, assemble the tart with the chilled or room-temperature filling.

Make the maple pecans shortly before serving for the best crunch.

Preparing components ahead of time is a common strategy for squash tarts and makes the final assembly much less stressful.

How to Store Leftovers

Allow the tart to cool completely.

Place leftovers in an airtight container and refrigerate for up to 3 days.

For the best texture, reheat slices in a 350°F oven for 8–12 minutes.

I don’t recommend microwaving if you can avoid it because the pastry will soften.

The oven brings the crispness back much better.

Can I Freeze This Tart?

Yes, although the pastry is best when freshly baked.

Let the baked tart cool completely, then wrap individual slices tightly and freeze.

For best quality, use within about 1 month.

Thaw overnight in the refrigerator and reheat in a 350°F oven until warmed through and crisp.

The general idea of freezing and reheating baked puff-pastry tarts is well established, although fresh-baked pastry will always have the crispest texture.

What to Serve With This Tart

This tart is substantial enough to be a light vegetarian main course, but it also makes a beautiful side dish.

Serve it with:

• Simple arugula salad
• Mixed green salad with lemon vinaigrette
• Roasted Brussels sprouts
• Green beans
• Cranberry-orange salad
• Tomato soup
• Butternut squash soup
• Herb-roasted chicken
• Roast turkey
• Baked salmon

For a holiday table, I love serving it alongside a simple green salad.

The fresh greens cut through the richness of the Brie and pastry perfectly.

Perfect for Thanksgiving and Holiday Gatherings

This is one of those recipes that looks right at home on a holiday table.

The orange squash, ruby-red cranberries, golden pastry, creamy Brie, and toasted pecans make it naturally festive without requiring elaborate decoration.

And unlike some holiday dishes, you don’t need to serve it piping hot.

It’s delicious warm or at room temperature, which makes it much easier to work into a busy dinner spread.

Frequently Asked Questions

Can I use frozen butternut squash?

Yes, although fresh squash generally gives you better roasted edges.

If using frozen cubes, roast them directly from frozen and give them enough space on the baking sheet so excess moisture can evaporate.

Can I use pre-caramelized onions?

Absolutely.

If you have leftover caramelized onions from another recipe, this tart is a wonderful way to use them.

Do I have to use Brie?

No.

Camembert, goat cheese, Gruyère, or even sharp white cheddar can work.

Brie gives the softest and creamiest result.

Can I use fresh cranberries instead of dried?

Yes, but fresh cranberries are much more tart and juicy.

I’d cook them briefly with maple syrup and orange juice until they soften and become slightly jammy before adding them to the tart.

Can I leave out the maple syrup?

Yes.

The squash and onions already provide natural sweetness. The maple is mainly there to enhance the pecans and bring the flavors together.

Why is my puff pastry soggy?

The most common reasons are excess moisture from the filling, overcrowding the tart, or not baking it long enough.

Make sure your squash is well roasted and your onions are cooked until jammy rather than watery.

Can I make mini tarts?

Definitely.

Cut the puff pastry into smaller rectangles or squares and make individual portions.

Reduce the baking time and watch for golden, puffed edges.

Is this tart vegetarian?

Yes, provided you use vegetarian-friendly Brie and puff pastry. Check packaged ingredients if this is important for your dietary needs.

Recipe at a Glance

Prep Time: 25 minutes
Roasting Time: 25–30 minutes
Caramelizing Time: 25–35 minutes
Tart Baking Time: 20–25 minutes
Total Time: About 1 hour 30 minutes
Servings: 6–8

Final Thoughts

I think this tart is proof that comfort food doesn’t have to be heavy or complicated.

You’ve got sweet roasted butternut squash, golden caramelized onions, creamy Brie, tart cranberries, buttery maple pecans, and flaky pastry—all in one beautiful dish.

Every bite has something different going on.

Sometimes you get a crispy corner with melted Brie.

Sometimes you get a sweet piece of squash with a crunchy pecan.

And then you’ll get one bite where the cranberry cuts through everything with that little burst of tartness.

It’s the kind of food I love putting in the middle of the table and letting everyone help themselves.

I can imagine serving it on a quiet Sunday afternoon, bringing it to a Thanksgiving gathering, or making it for a cozy dinner when I want something that feels a little more special than the usual weeknight meal.

And the best part?

It looks like you worked incredibly hard.

You don’t have to tell anyone how straightforward it really was.

Flaky pastry, sweet roasted squash, silky caramelized onions, creamy Brie, tart cranberries, and crunchy maple pecans—this is the kind of fall tart that makes everyone linger around the table for one more slice.