This Sweet Potato Casserole recipe with marshmallows is a classic holiday side dish made with mashed sweet potatoes topped with sweet marshmallows and candied pecans! An old fashioned family favourite recipe that’s easy to make ahead!
Estimated reading time: 11 minutes
There’s almost no dish quite as quintessentially “holiday” than a delicious Sweet Potato Casserole with marshmallows on top! We’ve loved this easy sweet potato casserole recipe for years for so many reasons – it’s a super simple recipe that’s easy to make (even for beginners!) and it can be made in stages, even made up to 2 days ahead of time to save time on the day of your holiday gathering. It’s the perfect side to serve with your holiday turkey, stuffing, gravy, and all your family’s favourite holiday dishes!
1. Choose the Best Sweet Potatoes:
- Color & Texture: Look for sweet potatoes with a rich orange colour. The skin should be smooth, firm, and free of any soft spots or blemishes.
- Size: Opt for medium-sized sweet potatoes instead of large ones because they tend to be sweeter and creamier. Large sweet potatoes can be more starchy than small or medium ones.
2. Bake the Sweet Potatoes First:
- Preheat your oven to 375°F.
- Wash and scrub the sweet potatoes thoroughly. Prick them several times with a fork to allow steam to escape and ensure even cooking.
- Place the sweet potatoes on a baking sheet lined with parchment paper for easy cleanup.
- Bake for about 45-55 minutes, or until a knife or fork can easily pierce through the thickest part of each sweet potato.
Troubleshooting Tip: If your sweet potatoes are undercooked after the suggested time, extend the baking time in 10-minute increments. Remember, sizes vary, so adjust accordingly.
Time-saving Tip: This step can be done up to two days ahead of assembling the casserole. Simply bake the sweet potatoes and after they’re cooled, transfer them to an airtight container or bag and store them in the fridge until ready to use.
3. Achieve the Right Consistency:
- Once baked and mostly cooled, peel the skin off the sweet potatoes. It should come off easily with your fingers. You can also slice the sweet potatoes in half and scoop out the soft flesh into a bowl.
- Use a potato masher or a fork to mash the sweet potatoes. We don’t recommend a hand mixer as this can make them gluey, so for an ultra-smooth texture, use a potato ricer (paid link). This will give you the perfect creamy texture with no lumps!
4. Mixing in Other Ingredients for Flavour and Texture:
- To the mashed sweet potatoes, add the rest of the filling ingredients. Mix until well combined.
Troubleshooting Tip: If your mixture seems too dry, add more butter or a touch more cream to reach the desired creamy consistency.
5. Assembling the Casserole:
- Grease a casserole dish with butter or non-stick spray.
- Spread the mashed sweet potato mixture evenly in the dish, smoothing the top with a spatula.
Time-saving Tip: If you want to save time on the day of your holiday gathering, simply cover your dish with plastic wrap and place it in the fridge for up to 2 days. Add the marshmallows and pecans just before baking.
6. Adding Marshmallows and Candied Pecans:
- Evenly distribute marshmallows over the mashed sweet potatoes, ensuring the surface is mostly covered. Don’t add too many marshmallows. They’ll expand in the oven so it’s ok if there are bits of sweet potato peeking through.
- Sprinkle the candied pecans over the marshmallows, spacing them out so each serving will have a few.
Troubleshooting Tip: If you’re worried about the marshmallows or pecans burning before the casserole is heated through, don’t cover the dish with aluminum foil! The aluminum foil can stick to the marshmallows, making a huge mess. Be sure to keep your oven at the temperature indicated in the recipe so the marshmallows don’t over-brown.
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When it comes to holiday side dishes we’ve got you covered with ALL the classic recipes and a ton of new favourites too! Here’s our roundup of must-make holiday sides for your Thanksgiving or Christmas dinner – they’ll all go great with this sweet potato casserole recipe!
- Slow Cooker Mashed Potatoes
- Creamy Instant Pot Mashed Potatoes
- Best Ever Creamy Mashed Potatoes
- Maple Rosemary Roasted Sweet Potatoes
- Roasted Potatoes and Carrots
- Rosemary Dill Roasted Potatoes
- Garlic Parmesan Oven Roasted Potatoes
- Spicy Roasted Sweet Potatoes
- Green Bean Casserole (Vegan and Non-Vegan Option)
- Roasted Green Beans with Cherry Tomatoes
- Rainbow Carrots
- Garlic Butter Roasted Carrots
- Balsamic Honey Glazed Carrots
- Easy Brussels Sprouts Gratin with Bacon
- Cheesy Broccoli Cauliflower Casserole
- Easy Roasted Brussels Sprouts
- Kale Salad with Butternut Squash
- Crunchy Broccoli Salad
- Pear Salad with Walnuts, Prosciutto and Goat Cheese Arugula
- Healthy Spinach Arugula Salad
- Grapefruit and Arugula Salad with Honey-Lemon Vinaigrette
- Pomegranate Salad with Kale and Quinoa
- Garlic Butter Roasted Mushrooms
- Quick Dinner Rolls – Ready in one hour!
- Homemade Dinner Rolls
- Easy Homemade Garlic Butter Dinner Rolls
- Sausage Stuffing
- Homemade Stuffing
- Butternut Squash Stuffing
- Cranberry Bacon Stuffing (Quick Stuffing Recipe)
Here’s a list of the kitchen equipment you’ll need to make this easy sweet potato casserole recipe with marshmallows (paid links):
- a large baking sheet
- a chef’s knife
- measuring cups and spoons
- liquid measuring cups
- a potato ricer or potato masher
- a silicone spatula
- a large baking dish
- small prep bowls
Here’s a list of the ingredients you’ll need to make this homemade sweet potato casserole recipe (paid links):
- 4 pounds sweet potatoes approximately 5 to 7 medium sweet potatoes
- 1/3 cup brown sugar
- 1 teaspoon cinnamon
- 1/2 teaspoon paprika
- 1 teaspoon salt
- 1/2 teaspoon pepper
- 1 egg
- 1/3 cup heavy whipping cream
- 1 cup pecans
- 2 tablespoons melted butter
- 2 tablespoons brown sugar
- 2 1/2 cups mini marshmallows
1. Almonds or Walnuts: Swap candied pecans for a mix of candied walnuts and almonds.
2. Coconut: Add shredded coconut to the topping or into the sweet potato mash.
3. Chocolate Chip: Add some semi-sweet or dark chocolate chips on top with the marshmallow topping.
4. Savoury Herb: Add some fresh rosemary, thyme, and garlic to the filling and bake as directed.
5. Creamy and Cheesy: Incorporate some cream cheese or mascarpone cheese into the filling for a rich and velvety texture.
6. Crunchy Streusel Topping: Combine flour, brown sugar, butter, and chopped nuts (pecans, walnuts, or almonds). Sprinkle on top of the sweet potato mixture before baking, in place of or in addition to the marshmallows.
7. Gingersnap Crunch: Add some crushed gingersnap cookies on top along with the pecans and marshmallows.
8. Caramel: Drizzle some caramel sauce over the marshmallow topping after baking.
Time needed: 1 hour and 30 minutes
Follow these steps for the perfect sweet potato casserole recipe!
- Bake the sweet potatoes first.
Bake the sweet potatoes whole on a parchment lined baking sheet until they’re tender.
- Use a potato ricer.
Using a potato ricer creates an ultra smooth sweet potato filling. If you don’t have one, mash them well with a potato masher or a fork.
- Make the filling.
Add the other filling ingredients to the mashed sweet potatoes in a bowl and mix well. Add the filling into a greased baking dish.
- Make the topping.
Add the marshmallows on top of the sweet potatoes. Mix the pecans with the melted butter and brown sugar and sprinkle them on top as well.
- Bake to perfection.
Bake uncovered until the marshmallows are browned.
Can I make sweet potato casserole with marshmallows ahead of time?
Absolutely! You can prepare the mashed sweet potato mixture a day or two in advance. Store it in the refrigerator. When you’re ready to bake, just add the toppings and pop it in the oven.
Can I freeze sweet potato caserole?
Yes, you can freeze the casserole, but it’s best to freeze it before adding the marshmallow or pecan topping. Wrap it tightly in plastic wrap. When you’re ready to serve, thaw in the refrigerator, add the toppings, and bake.
How can I make sweet potato casserole vegan or dairy free?
To make a vegan or dairy-free version, replace regular butter with vegan butter or coconut oil, use a plant-based cream like coconut cream, and make sure you use vegan marshmallows.
Why is my sweet potato casserole too watery?
This can happen if the sweet potatoes were overcooked or if too much liquid (like cream) was added. It’s crucial to bake the sweet potatoes until just done and add liquids sparingly.
Can I use canned sweet potatoes instead of fresh?
Yes, you can use canned sweet potatoes. However, fresh sweet potatoes generally offer a better flavour and texture. If using canned, ensure you drain and rinse them well and adjust the added sugar since many canned varieties come pre-sweetened.
What can I use instead of marshmallows for the topping?
If you’re not a fan of marshmallows, you can use a streusel topping, whipped meringue, or simply increase the amount of candied pecans.
How long can I store leftover sweet potato casserole with marshmallows?
Leftovers can be stored in the refrigerator for up to 3 days. Ensure it’s covered tightly with plastic wrap or in an airtight container.
Can I use other spices to my sweet potato casserole?
Definitely! While cinnamon is a favourite, spices like nutmeg, allspice, ginger, or cloves can also be added to enhance the flavour.
We hope you love this sweet potato casserole with marshmallows as much as we do! Let us know in the comments below, what’s your favourite side dish for the holidays? We’d love to know!
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Sweet Potato Casserole
Recipe: Equipment
Recipe: Ingredients
- 4 pounds sweet potatoes approximately 5 to 7 medium sweet potatoes
- 1/3 cup brown sugar
- 1 teaspoon cinnamon
- 1/2 teaspoon paprika
- 1 teaspoon salt
- 1/2 teaspoon pepper
- 1 egg
- 1/3 cup heavy whipping cream
- 1 cup pecans
- 2 tablespoons melted butter
- 2 tablespoons brown sugar
- 2 1/2 cups mini marshmallows
Recipe: Instructions
For the sweet potatoes:
- Preheat your oven to 375 degrees Fahrenheit. Line a large baking sheet with parchment paper.
- Wash and dry the sweet potatoes, piercing them with a fork.
- Bake the sweet potatoes whole for about 45-55 minutes, or until they're tender.
- Cool the sweet potatoes until almost completely cool.
For the filling:
- Peel the sweet potatoes and mash them until no lumps remain. We like using a potato ricer to make sure there are no lumps.
- Add the brown sugar, cinnamon, paprika, salt, pepper, egg and heavy cream to the bowl with the sweet potatoes and mix well until smooth and combined.
- Grease a large 9-inch by 13-inch baking dish and add the sweet potato mixture to the baking dish, smoothing out the top.
For the topping:
- Be sure your oven is preheated to 350 degrees Fahrenheit.
- Add the pecans, brown sugar and melted butter to a bowl and toss well until the pecans are coated in the sugar.
- Sprinkle the marshmallows over the top of the sweet potato layer, making sure to evenly distribute them over the top.
- Sprinkle the pecans on top of the marshmallows, distributing them evenly.
- Bake for 25-30 minutes at 350 degrees Fahrenheit until the marshmallows are golden brown.
- Let the casserole sit for 5-10 minutes before serving.
Recipe: Notes
Make-Ahead Instructions
To make this casserole ahead of time:- Bake the sweet potatoes up to 2 days ahead of time. Cool and store in an airtight container in the fridge until ready to assemble the casserole.
- OR Prepare the casserole just until ready to add the toppings. Cover with plastic wrap and refrigerate for up to two days. Add the topping just before baking.
Storage Instructions
Store any leftovers in a airtight container in the fridge for up to 3 days. Reheat before servings.Reheating Instructions
We recommend re-heating leftovers in a baking dish in the oven for best results (until heated through), but they can also be reheated in the microwave.Recipe: Nutrition
Notice: Nutrition is auto-calculated, using Spoonacular, for your convenience. Where relevant, we recommend using your own nutrition calculations.