Creamy Roasted Butternut Squash Pie

Finding a dessert that feels both cozy and a little special for fall gatherings can be tricky. You want something that tastes homemade and seasonal, but you don’t always have hours to spend in the kitchen, especially when you’re juggling dinner prep and everything else that comes with hosting.

This roasted butternut squash pie hits the sweet spot perfectly: it’s got that warm, spiced flavor everyone loves about fall, uses ingredients you can easily find at the store, and can be made ahead of time so you’re not scrambling on the day of your dinner party.

What Kind of Butternut Squash Should I Use?

When shopping for butternut squash, look for one that feels heavy for its size and has a matte, tan-colored skin without any soft spots or green patches. A medium squash weighing around 2 pounds is perfect for this recipe and will give you just the right amount of filling. You can definitely use pre-cut butternut squash from the grocery store if you want to save time, though it might cost a bit more. Just make sure the pieces look fresh and aren’t dried out around the edges. If you’re cutting your own, a sharp knife and a sturdy cutting board will make the job much easier.

Options for Substitutions

This savory pie is quite forgiving when it comes to swaps, so here are some options if you need to make changes:

• Butternut squash: You can easily swap this with acorn squash, delicata squash, or even sweet potatoes. Just keep the prep and cooking time the same – they’ll all roast nicely with the same method.
• Large onions: If you don’t have large onions, use about 4-5 medium onions instead. Sweet onions like Vidalia work great here too and will give you a slightly milder flavor.
• Spelt or butter pie crust: Any standard pie crust will work fine – store-bought, whole wheat, or even a graham cracker crust if you want something different. Just make sure it’s pre-baked according to your crust’s instructions.
• Feta cheese: Goat cheese, ricotta, or even sharp cheddar can step in for feta. If using cheddar, use a bit less since it’s stronger in flavor.
• Heavy cream and whole milk: You can use all milk if you don’t have cream, or substitute with half-and-half. The texture will be slightly less rich but still tasty.
• Fresh thyme: Dried thyme works too – just use about ⅓ the amount. Rosemary or sage would also be nice alternatives if that’s what you have on hand.

Watch Out for These Mistakes While Baking

The biggest mistake when making this savory pie is not properly roasting the butternut squash until it’s tender and slightly caramelized – undercooked squash will remain hard and won’t blend well with the other flavors. Make sure to caramelize those onions slowly over medium-low heat for at least 20-30 minutes until they’re golden brown and sweet, as rushing this step will leave you with sharp, bitter onions that overpower the dish. Don’t skip pre-baking your pie crust for 10-12 minutes before adding the filling, or you’ll end up with a soggy bottom that won’t hold up to all that moisture from the vegetables. Finally, let the pie cool for at least 15 minutes after baking so the custard can set properly – cutting into it too early will result in a runny mess that won’t slice cleanly.

What to Serve With Butternut Squash Pie?

This savory pie is perfect for a cozy dinner and pairs beautifully with a simple arugula or mixed greens salad dressed with a light vinaigrette to balance out the rich, creamy filling. Since the pie has sweet butternut squash and tangy feta, I love serving it alongside roasted Brussels sprouts or green beans for some extra vegetables on the plate. A glass of crisp white wine like Sauvignon Blanc or a light Pinot Grigio complements the flavors really well too. For a heartier meal, try adding some roasted chicken or turkey on the side, especially during fall when butternut squash is at its peak.

Storage Instructions

Keep Fresh: This butternut squash pie tastes amazing the next day! Cover it with foil or plastic wrap and keep it in the fridge for up to 4 days. The flavors actually get better as they meld together, so don’t worry about making it a day ahead for company.

Freeze: You can freeze this pie for up to 3 months, either before or after baking. If freezing unbaked, wrap it tightly in plastic wrap and foil. For a baked pie, let it cool completely first, then wrap well and freeze in portions if you’d like.

Warm Up: To serve leftover pie, let it come to room temperature for about 30 minutes, then warm it in a 350°F oven for 10-15 minutes until heated through. You can also enjoy it cold – it’s surprisingly good that way too, especially on a hot day!

Preparation Time	30-45 minutes
Cooking Time	90-105 minutes
Total Time	120-150 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 1700-1900
• Protein: 35-40 g
• Fat: 80-90 g
• Carbohydrates: 210-230 g

Ingredients

For the roasted squash:

• 1 medium butternut squash (about 2 lb, peeled and diced into 1/4-inch pieces)
• 1 tbsp olive oil
• Coarse kosher salt, to taste

For the caramelized onions:

• 3 large onions (about 3 lb, peeled, halved, and thinly sliced)
• 2 tbsp olive oil (or use the same oil from roasting squash)
• Pinch of coarse kosher salt
• 1 tbsp balsamic vinegar (adds deep sweetness to caramelization)

For the pie shell:

• 1 prepared 9-inch spelt or butter pie crust (thaw if frozen, about 30 minutes)

For the filling:

• 1 tsp fresh thyme leaves (strip from stems before measuring)
• 2 green onions (thinly sliced, white and light green parts)
• 2 tsp apple cider vinegar or lemon juice
• 1/2 cup crumbled feta cheese (I use President or Athenos brand)
• 1/4 cup heavy cream (gives rich, creamy texture)
• 1/2 cup whole milk
• 1 tsp coarse kosher salt
• 2 large eggs (room temperature for better blending)
• 1 tsp freshly ground black pepper (freshly ground preferred for more flavor)

Step 1: Roast the Butternut Squash

• 1 medium butternut squash
• 1 tbsp olive oil
• Coarse kosher salt, to taste

Preheat your oven to 400°F.

Toss the diced butternut squash with 1 tablespoon of olive oil and a generous pinch of coarse kosher salt on a baking sheet, spreading it in a single layer.

Roast for 30 minutes, stirring halfway through, until the squash is golden and tender with caramelized edges.

This deep roasting develops the natural sweetness of the squash, which will be essential for balancing the savory elements in the pie.

Step 2: Caramelize the Onions

• 3 large onions
• 2 tbsp olive oil
• 1 tbsp balsamic vinegar
• Pinch of coarse kosher salt

While the squash roasts, heat 2 tablespoons of olive oil in a large skillet over medium heat.

Add the thinly sliced onions and cook for 10 minutes, stirring occasionally, until they begin to soften and release their moisture.

Add a pinch of salt, reduce heat to medium-low, and continue cooking for 35 minutes total (stirring every 5 minutes), allowing the onions to slowly caramelize and develop deep, sweet, complex flavors.

In the final 5 minutes, stir in the balsamic vinegar and cook through.

I prefer to use the same oil that the squash was roasted in if possible—it adds extra flavor depth.

Set the caramelized onions aside to cool slightly.

Step 3: Prepare and Blind Bake the Pie Crust

• 1 prepared 9-inch spelt or butter pie crust

Remove the pie crust from the freezer and let it thaw for about 30 minutes at room temperature.

Roll it out to about 11 inches in diameter, then carefully transfer it to your 9-inch pie plate.

Crimp the edges decoratively and prick the bottom several times with a fork to prevent puffing during baking.

Freeze the crust for at least 15 minutes while you continue with other steps.

After the oven has finished roasting the squash, increase the temperature to 425°F.

Line the chilled pie shell with parchment paper and fill with pie weights or dried beans.

Blind bake (partially bake without filling) for 20 minutes until the edges are just set but still pale, then carefully remove the parchment and weights.

Bake for an additional 5 minutes to dry out the bottom.

Lower the oven temperature to 375°F for the final assembly and baking.

Step 4: Make the Custard Filling

• roasted butternut squash from Step 1
• caramelized onions from Step 2
• 2 large eggs
• 1/2 cup whole milk
• 1/4 cup heavy cream
• 2 tsp apple cider vinegar or lemon juice
• 1 tsp coarse kosher salt
• 1 tsp freshly ground black pepper
• 1/2 cup crumbled feta cheese
• 2 green onions
• 1 tsp fresh thyme leaves

In a large bowl, whisk together the room-temperature eggs, whole milk, heavy cream, apple cider vinegar (or lemon juice), salt, and freshly ground black pepper until well combined and smooth.

The room temperature eggs blend much more smoothly into the custard without creating lumps.

Fold in the roasted butternut squash from Step 1 and caramelized onions from Step 2, gently combining until evenly distributed.

Add the crumbled feta cheese, thinly sliced green onions, and fresh thyme leaves, stirring just until incorporated.

I like to taste a small spoonful here and adjust the seasoning if needed—the filling should taste slightly seasoned but not overly salty since it will concentrate as it bakes.

Step 5: Fill and Bake the Pie

• custard filling from Step 4
• blind-baked pie crust from Step 3

Pour the custard filling from Step 4 into the blind-baked pie crust from Step 3, distributing the vegetables and cheese evenly throughout.

Bake at 375°F for 35 to 40 minutes, until the filling is set around the edges but still has a very slight jiggle in the center (about 2 inches in diameter)—this indicates the custard is cooked through but still creamy and not overcooked.

The pie will continue to set slightly as it cools.

Remove from the oven and let cool for 5 to 10 minutes before slicing, which allows the structure to firm up just enough for clean, beautiful slices while maintaining that creamy interior texture.