Butternut Squash Casserole with Apples

Sweet and savory, buttery and crunchy, this mashed Butternut Squash Casserole with apples, brown sugar, and pecans has it all! The layered make-ahead side dish has been a family favorite for over 40 years, and it’s the perfect addition to your Thanksgiving or Christmas table!

Butternut Squash and Apple Casserole

This roasted and mashed butternut squash casserole recipe has made an appearance on my mom’s Thanksgiving table (and now on my own table) for over 50 years! As I understand it, Mom received the recipe from her friend when their husbands were in law school together. It has been served every fall since, because it’s that good.

Butternut squash casserole recipes are a staple in many households at this time of year, and this particular version is the absolute best. The layered casserole combines sautéed apples, roasted and mashed butternut squash, pecans, brown sugar, and butter in one decadent dish. It’s the perfect complement to a big turkey dinner, but it also works equally well with a roasted chicken on a cool, autumn, evening.

Ingredients for Mashed Butternut Squash Casserole

This is a quick overview of the ingredients that you’ll need for the butternut squash and apple casserole. As always, specific measurements and complete cooking instructions are included in the printable recipe box at the bottom of the post.

• Butternut squash: roasting brings out the natural sweetness of the squash, which then gets whipped with butter and brown sugar.
• Olive oil: to coat the squash before roasting.
• Apples: I like firm-flesh apples that don’t break down and turn to mush during the cooking process. Good options include Granny Smith, Honey Crisp, Braeburn and Pink Lady.
• Salted butter: adds rich flavor to every layer of the casserole.
• Brown sugar: for warm sweetness in every layer!
• Salt: to balance the sweetness and enhance the other flavors in the dish.
• Corn Flakes cereal: the perfect crunchy topping on this fall casserole.
• Pecans: coarsely chopped for a toasted, nutty addition to the topping.

Do you peel the butternut squash?

No, you don’t need to peel the squash before roasting. Cook the butternut squash with the skin intact. Once the inside of the squash is soft, you can scoop out the flesh with a spoon quickly and easily!

How to Make a Butternut Squash Casserole

This special casserole isn’t difficult to prepare, but it does require quite a few steps. As a result, it’s a great option to assemble in advance (preferably the day before a holiday). That way you’re not rushing or stressed in the kitchen, and you can just pop the casserole into the oven with the rest of your sides!

1. Roast the butternut squash, then scoop out the flesh and mash in a food processor with butter, brown sugar and salt.
2. Sauté apples in butter with brown sugar until soft.
3. Transfer the apples to the bottom of a greased 2-3 quart casserole dish.
4. Spread squash over top.
5. Combine Corn Flakes, pecans, brown sugar and melted butter to make the topping.
6. Sprinkle topping over the butternut squash.
7. Bake, uncovered, in a 350°F oven for 25 minutes, or until heated through.

What to Serve with Butternut Squash Casserole

This casserole is the perfect addition to your Thanksgiving or Christmas holiday table, but it’s also a special side dish to serve with a big Sunday supper. Here are some entrees that pair nicely with the vegetarian side dish:

• Smoked Turkey Breast or Garlic and Herb Roast Turkey Breast
• Ham Steaks with Brown Sugar Glaze
• Pineapple Glazed Ham or Virginia Brown Sugar Baked Ham
• Southern Bourbon-Glazed Beef Tenderloin
• Crispy Roast Chicken with Vegetables
• Rosemary Oven Roasted Chicken
• Dutch Oven Pork Roast with Gravy
• Pork Sirloin Roast
• Mustard and Brown Sugar Baked Pork Tenderloin or Bacon-Wrapped Pork Tenderloin
• Bacon Wrapped Chicken Breast

Make Ahead

To prepare this dish in advance, assemble the casserole as instructed, but do not add the Corn Flake topping. Cover and refrigerate for up to 24 hours. When ready to bake, allow the dish to sit on the counter for about 1-2 hours to come to room temperature. Add the topping and bake according to the recipe instructions.

Storage

Store leftovers in an airtight container in the refrigerator for 3-4 days.

Can you freeze Butternut Squash Casserole?

Wrapped tightly, the leftover casserole will keep in an airtight container in the freezer for up to 3 months. Thaw overnight in the refrigerator before reheating.

How to Reheat Butternut Squash and Pecan Casserole

Cover the dish loosely with foil. Warm in a 350°F oven until heated through, about 20-25 minutes. Reheat smaller portions in the microwave for 30-60 seconds.

Recipe Variations

• What spices pair well with butternut squash? If you’d like to add some warm spices to this dish, try cinnamon, nutmeg or ginger, which will work really well with the brown sugar, too. For a different flavor profile, you could also add a dash of cayenne for some kick.
• Replace the chopped pecans with chopped walnuts or slivered almonds if you prefer.
• Butternut Squash Casserole with Meat: turn this dish into a sweet-and-savory entrée by adding a layer of browned sausage, shredded chicken or turkey, pulled pork, or cooked ground beef.
• Feeding a larger group? Double all of the ingredients and assemble the casserole in a 9 x 13-inch dish. Add about 5-10 minutes to the total baking time, covering the top loosely with foil once the nuts are toasted and brown.

Tips for the Best Butternut Squash Casserole

• Use firm-flesh apples that won’t break down into mush during the cooking process. Good options include Honey Crisp, Granny Smith, Braeburn and Pink Lady.
• Corn Flakes add a unique flavor and a crunchy texture that’s hard to replicate with a different ingredient. I highly recommend using the Corn Flakes instead of breadcrumbs or some other substitute. That said, if you really don’t care for the Corn Flakes, you might try coarsely crushed Ritz crackers instead.
• If prepping the casserole in advance, do not add the Corn Flakes topping until right before baking. Otherwise it will become soggy.
• When preparing the casserole in advance, allow the dish to sit on the counter and come to room temperature for 1-2 hours before baking. Otherwise you will need to extend the baking time in order for the casserole to fully heat through.
• Keep a close eye on the topping while the casserole bakes. The nuts can burn easily, so you may need to tent the dish loosely with foil during the final few minutes. This will prevent excessive browning on top while the inside of the casserole heats through.

More Thanksgiving Sides to Add to Your Holiday Menu

• Easy Green Bean Casserole
• Sweet Potato Casserole with Marshmallows
• 3-Ingredient Cranberry Orange Sauce
• Crescent Rolls
• Sausage Stuffing
• Southern Cornbread Stuffing
• Roasted Root Vegetables with Balsamic
• Mashed Potatoes with Sour Cream and Chives
• Creamy Baked Mac and Cheese

Butternut Squash Casserole with Apples and Pecans

5 from 2 votes

Prep: 1 hour hour

Cook: 25 minutes minutes

Total: 1 hour hour 25 minutes minutes

Servings 8 people

Calories 595 kcal

Sweet and savory, buttery and crunchy, this mashed Butternut Squash Casserole with apples, brown sugar, and pecans has it all!

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Ingredients

  

• 1 large butternut squash (about 3 lbs.)
• 1 tablespoon olive oil
• 4 medium apples, thinly sliced but not peeled (about 1 ¾ lbs.)
• 7 tablespoons salted butter, divided
• ¾ cup light brown sugar, divided
• ½ teaspoon salt
• 2 cups Corn Flakes cereal
• 1 cup chopped pecans

Instructions

• Cut the squash in half lengthwise. Scoop out the seeds. Rub olive oil on the flesh, then place the squash flesh-side down (skin-side up) on a foil-lined baking sheet. Roast in a 425°F oven for 35-40 minutes, or until tender when pierced with a fork.
• While the squash roasts, melt 2 tablespoons of butter in a large skillet. Add the sliced apples and ¼ cup of the brown sugar. Sauté the apples until they're soft, about 10-15 minutes.
• Use a slotted spoon to transfer the apples to a greased 2-quart or 3-quart casserole dish. Leave the juices from the apples in the skillet -- you don't need them in the casserole dish.
• While the squash is still warm, but cool enough to handle, use a large spoon to scoop out the cooked flesh. Place the flesh in a food processor or blender. Add 2 tablespoons of butter, ¼ cup of brown sugar, and salt; process until smooth. You don't need to melt the butter, since the warm squash will melt it as they mix. Spread the whipped squash on top of the sautéed apples in the casserole dish.
• Coarsely crush the Corn Flakes; place them in a small bowl. Add the chopped pecans and the remaining ¼ cup of brown sugar. Combine with 3 tablespoons of melted butter. Sprinkle the topping over the squash.
• Bake, uncovered, at 350°F for 25 minutes, or until heated through. Keep a close eye on the casserole as it bakes, since the pecans have a tendency to burn easily. You may need to tent the top of the dish loosely with foil during the final 5-10 minutes to prevent excessive browning on top.

Notes

• Use firm-flesh apples that won't break down into mush during the cooking process. Good options include Honey Crisp, Granny Smith, Braeburn and Pink Lady.
• Corn Flakes add a unique flavor and a crunchy texture that's hard to replicate with a different ingredient. I highly recommend using the Corn Flakes instead of breadcrumbs or some other substitute. That said, if you really don't care for the Corn Flakes, you might try coarsely crushed Ritz crackers instead.
• If prepping the casserole in advance, do not add the Corn Flakes topping until right before baking. Otherwise it will become soggy.
• When preparing the casserole in advance, allow the dish to sit on the counter and come to room temperature for 1-2 hours before baking. Otherwise you will need to extend the baking time in order for the casserole to fully heat through.
• Keep a close eye on the topping while the casserole bakes. The nuts can burn easily, so you may need to tent the dish loosely with foil during the final few minutes. This will prevent excessive browning on top while the inside of the casserole heats through.

Keyword: butternut squash and apple casserole, Butternut Squash Casserole, Butternut Squash Casserole with Brown Sugar and Pecans, mashed butternut squash casserole

Course: Side Dish

Cuisine: American

Author: Blair Lonergan

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This post was originally published in November, 2013. It was updated in October, 2021.