What Is Sweet Potato Apple Bake?
Sweet Potato Apple Bake is a layered side dish made with sliced sweet potatoes, peeled apples, mini marshmallows, cinnamon, sugar, and butter. A cornstarch-and-water mixture thickens the cooking juices. The casserole bakes under foil until both the potatoes and apples are tender, then rests before serving.
Why You'll Love This Recipe
Tart apples give this sweet casserole a little balance, while the sweet potato slices keep their own tender texture.
- The sweet potatoes go into the dish raw, so there's no separate boiling step.
- Two sets of layers put apples and melted marshmallows throughout the casserole.
- A 9x13-inch dish serves 10 to 12 alongside turkey, ham, pork, or chicken.
Recipe at a Glance
- Flavor: Sweet potatoes, tart apples, cinnamon, and buttery sweetness.
- Texture: Tender slices with lightly thickened juices.
- Prep: 20 minutes. Bake: About 1 hour at 350°F. Rest: 10 to 15 minutes.
- Yield: 10 to 12 servings. Difficulty: Simple slicing and layering.
- Make ahead: Follow the cooked-leftover storage and reheating guidance below; an overnight unbaked version hasn't been established here.
- Freezing: Not recommended. Best occasions: Fall meals, Thanksgiving, and Christmas dinner.
Where This Dish Comes From
Ingredients
Fresh sweet potatoes and Granny Smith apples give this bake its distinct layers; marshmallows, sugar, cinnamon, and butter sweeten the juices around them.
- 4 medium sweet potatoes: Peel and slice thinly so they can cook through during the covered bake.
- 4 large Granny Smith apples: Peel, core, and slice; their tartness balances the sweet ingredients.
- 2 cups mini marshmallows: Divide them between the two sets of layers.
- ½ cup granulated sugar and ¼ cup packed dark brown sugar: Sweeten the bake and add a deeper brown-sugar flavor.
- 1 teaspoon salt and 1 teaspoon ground cinnamon: Season the layers and add warmth.
- 2 tablespoons cornstarch and ½ cup water: Stir together until smooth before pouring over the casserole.
- 4 tablespoons butter: Cut into small pieces to distribute over the top.
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Ingredient Notes and Substitutions
Granny Smith apples give a tart flavor; Golden Delicious makes a sweeter bake. Honeycrisp, Braeburn, and Pink Lady also work. If you don't have mini marshmallows, cut regular marshmallows into smaller pieces. Light brown sugar can replace some or all of the granulated sugar for a deeper caramel-like flavor.
Tools That Make It Easier
A greased 9x13-inch baking dish and a tight foil cover are the essentials for this layered bake.
- Vegetable peeler, a sharp knife, and a cutting board for the sweet potatoes and apples.
- Small bowl for the sugars and seasonings.
- Measuring cups and spoons, plus a cup or bowl for the cornstarch mixture.
- Foil to cover the baking dish tightly.
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Buy Now → How to Make Sweet Potato Apple Bake
Layer the raw sliced sweet potatoes, apples, and marshmallows, add the remaining ingredients, and bake covered until tender. The photos below show each stage of this method.
1. Prepare the dish and mixtures
Heat the oven to 350°F and grease a 9x13-inch baking dish. Peel and thinly slice the sweet potatoes, then peel, core, and slice the apples. Combine the granulated sugar, dark brown sugar, salt, and cinnamon in a small bowl. Stir the cornstarch into the water until completely smooth.
2. Build two sets of layers
Arrange half the sweet potato slices in an even layer in the prepared dish. Add half the apples and half the mini marshmallows. Repeat in the same order with the remaining sweet potatoes, apples, and marshmallows.
3. Add the seasoning, slurry, and butter
Sprinkle the cinnamon-sugar mixture evenly over the casserole. Stir the cornstarch mixture again if it has settled, then pour it evenly over the top. Scatter the small pieces of butter across the casserole.
4. Cover and bake until tender
Cover the baking dish tightly with foil and bake for about 1 hour. Check the sweet potatoes and apples with a knife, including the slices near the center. Both should be tender; the knife test is more useful than looking at the top alone.
5. Let the juices settle, then serve
Let the casserole stand for 10 to 15 minutes before serving so the juices can thicken slightly. Spoon through the layers when serving to get sweet potatoes, apples, and their cinnamon-butter juices in each portion.
Helpful Tips Before You Start
Thin, reasonably even slices help the sweet potatoes finish cooking at the same time. Avoid mixing thick chunks with paper-thin pieces, and spread each layer across the dish instead of piling it in the middle.
A Few Easy Mistakes to Avoid
Don't use marshmallow browning as the doneness test. This recipe stays covered, and the marshmallows melt into the casserole. Test the sweet potatoes and apples with a knife; if the center is still firm, it needs more covered baking.
Don't sprinkle dry cornstarch over the dish or skip the resting time. Mixing the cornstarch with water first helps it disperse without dry pockets, and the hot juices remain looser before the casserole rests.
A Few Things That Make This Recipe Better
Keep the tart apples, the tight foil cover, and the short rest in mind. Together, those details balance the sweetness, help the raw slices cook through, and give the juices a little more body before the bake reaches the plate.
For a different sweet potato side, try mashed sweet potatoes with orange and thyme when you want a smoother, more savory direction.
Keeping Leftovers Fresh
Store cooled leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave, or warm the casserole, covered, in a 325°F oven until heated through.
Can you freeze it? Freezing is not recommended for this recipe.
Can You Make It Ahead?
The confirmed advance option is to cook the casserole and use the refrigerator and reheating directions above. This recipe does not establish an overnight, unbaked assembly method or a separate baking time for a cold casserole.
What to serve with Sweet Potato and Apple Bake?
Smoked Chicken Leg Quarters with Heinz BBQ Texas Bold & Spicy BBQ Sauce
Pan Roasted Chicken with Lemon & Fresh Herbs
Simply Grilled Wild Sockeye Salmon
Brown Sugar Balsamic Glazed Pork Loin
Serve this sweet side with herb butter roasted turkey, baked ham, pork loin, or roasted chicken. For a complete holiday menu, browse Thanksgiving Favorites.
Herb Butter Roasted Turkey in an Oven Bag
Copycat Honey Baked Ham
Weeknight Oven Roasted Chicken
FAQs
Do I need to boil the sweet potatoes first?
No. This tested method starts with peeled, raw, thinly sliced sweet potatoes. They cook under the foil with the apples and the added liquid.
Will there be a fluffy marshmallow topping?
The marshmallows are layered inside the casserole and on top before the covered bake. Expect them to melt into the juices rather than stay as a separate fluffy, toasted cap.
Why are my sweet potatoes still firm?
Thicker slices and a loosely covered dish can make the center take longer. Keep the dish covered and continue baking until both the sweet potatoes and apples are tender when pierced with a knife.
Why are the juices still thin?
Check that the cornstarch mixture was stirred smooth and added to the casserole, then allow the full 10 to 15 minutes of standing time. The juices should thicken slightly; this is a saucy sliced bake, not a firm mashed casserole.
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Tried It?
If you make this bake, leave a rating and tell me which apples you used. I'd love to hear what you served with it.
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Sweet Potato Apple Bake
This Sweet Potato Apple Bake layers tender sweet potatoes and apples with cinnamon, butter, and marshmallows for an easy, cozy holiday side dish.
- Prep Time: 20 minutes
- Cook Time: 1 hour
- Total Time: 1 hour 35 minutes
- Yield: 10 to 12 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American, Southern
Ingredients
4 medium sweet potatoes, peeled and thinly sliced
4 large Granny Smith apples, peeled, cored, and sliced
2 cups mini marshmallows
½ cup granulated sugar
¼ dark brown sugar, packed
1 teaspoon salt
1 teaspoon ground cinnamon
2 tablespoons cornstarch
½ cup water
4 tablespoons butter, cut into small pieces
Instructions
Prep
- Heat the oven to 350°F.
- Grease a 9x13-inch baking dish.
- In a small bowl, combine the sugars, salt, and cinnamon.
- Stir the cornstarch into the water until completely smooth.
Assemble
- Arrange half of the sweet potato slices in an even layer in the prepared baking dish.
- Add half of the sliced apples, followed by half of the mini marshmallows.
- Repeat with the remaining sweet potatoes, apples, and marshmallows.
- Sprinkle the cinnamon-sugar mixture evenly over the casserole.
- Pour the cornstarch mixture evenly over the top.
- Scatter the butter pieces across the casserole.
- Cover the baking dish tightly with foil.
Bake
- Bake for about 1 hour, or until the sweet potatoes and apples are tender when pierced with a knife.
••Let the casserole stand for 10 to 15 minutes before serving so the juices can thicken slightly.
Notes
Substitutions
- Granny Smith apples give the casserole a more tart flavor, while Golden Delicious apples make it sweeter.
- Honeycrisp, Braeburn, or Pink Lady apples may also be used.
- Regular marshmallows can be cut into smaller pieces if mini marshmallows are unavailable.
- Light brown sugar can replace some or all of the granulated sugar for a deeper caramel-like flavor.
Serving Suggestions and Pairings
Serve this sweet potato apple bake alongside roast turkey, baked ham, pork loin, or roasted chicken. It works especially well as a Thanksgiving or Christmas side dish.
Storage
Cool leftovers completely and store them in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or warm the casserole, covered, in a 325°F oven until heated through.
Freezing
Freezing is not recommended.
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