Traditional Sweet Potato Casserole Recipe made with smooth and creamy mashed sweet potatoes and topped with brown sugar, pecans, and gooey mini marshmallows. Everyone’s favorite sweet and savory sweet potato side dish and a must-have on any Thanksgiving table.
The Best Sweet Potato Casserole Recipe
This sweet potato casserole is, without question, my favorite part of Christmas and Thanksgiving dinner. Luscious, creamy, and sweet, it perfectly complements the more savory side dishes like green bean casserole, mashed potatoes, stuffing, and of course, turkey!
This yummy sweet potato casserole has it all,
- Brown sugar
- and, of course, sweet potatoes!
It’s like dessert, but for dinner.
Of course, you could lighten up this mouthwatering side dish by adding less sugar and butter or skip the marshmallow topping altogether – or, go big and make it even sweeter!
Warm, inviting, and full of fall flavors, you’ll love this sweet and easy, buttery and delicious sweet potato casserole.
How to Cook Sweet Potatoes for Sweet Potato Casserole?
You have several options when deciding how to prepare the sweet potatoes for this holiday casserole. You can:
- Instant Pot
Each method comes with its own set of pros and cons, but if you’re looking for the fastest method, cook your sweet potatoes in the Instant Pot.
For today, I’ve shown how to make this recipe using peeled, cubed, and boiled sweet potatoes. Although the Instant Pot is a little faster, nothing compares to a simple pot of water on the stovetop.
Finally, baked sweet potatoes will also work, however, they will take the longest to cook.
How to Make Sweet Potato Casserole
1. Prepare oven and casserole dish:
Preheat your oven to 350 degrees F. with the oven rack placed in the center position. Grab a large 9×13-inch casserole pan or baking dish and spray with non-stick cooking spray.
2. Wash and cook the sweet potatoes:
Wash and dry the sweet potatoes. Since we’re going to boil our potatoes, peel and chop each sweet potato into 1-inch cubes, or cubes that are equal in size to ensure equal cooking.
Transfer the potatoes to a large pot and fill it with cold water until the potatoes are covered by approximately 2-inches of water.
Simmer for approximately 15 minutes, or until fully cooked and fork-tender.
3. Mix together the brown sugar, eggs, milk, butter, vanilla extract, ground cinnamon, and salt. Set aside.
4. Mash the cooked potatoes:
Drain the cooked sweet potatoes and transfer them to a large bowl. Mash until smooth. Add the brown sugar and egg mixture (from step 3 above) and mix to combine.
Transfer the mashed sweet potato mixture to your prepared casserole dish, and use a rubber spatula to spread it into an even layer.
5. Prepare the crumble topping:
In a small bowl combine the toasted pecans, all-purpose flour, brown sugar, melted butter, and a pinch of salt.
Sprinkle half of the prepared pecan topping over the top of your sweet potatoes followed by approximately 2 cups of marshmallows (more or less depending on how much you love marshmallows), and finally, the last of the pecan topping.
Bake for 25-35 minutes, or until the tops of your marshmallows are golden brown and the potatoes are heated through.
Can You Make Sweet Potato Casserole Ahead of Time?
Yes. To make this sweet potato casserole ahead of time simply prepare and cook the mashed sweet potatoes up to 2 days in advance. Keep them stored in an airtight container in the refrigerator until ready to use. When you’re ready to make your casserole, continue to assemble by adding the streusel topping and baking until heated throughout and golden on top.
Can You Freeze Sweet Potato Casserole?
To freeze, assemble your sweet potato casserole as instructed, but wait to add the marshmallows until just before baking. Cover tightly with plastic wrap or an air-tight lid. Transfer to the freezer and freeze for up to 1 month. To reheat, place in a preheated oven set at 375 degrees F for 1 hour, or until heated through.
Recipe Tips and Tricks
- Bright orange sweet potatoes are often labeled as “yams” at grocery stores and supermarkets. Learn more about the difference between yams and sweet potatoes.
- Gluten-free sweet potato casserole: use gluten-free all-purpose flour and gluten-free marshmallows.
- Nut-free sweet potato casserole: skip the pecans.
- Feel free to substitute some, or all, of the brown sugar for maple syrup.
- Leftovers will last for 5-7 days when stored in an airtight container in the refrigerator.
More Holiday Recipes,
Try making this delicious healthy green bean casserole made entirely from scratch with fresh green beans and homemade cream of mushroom soup.
For a fast and easy side dish, nothing beats peas and pancetta. Ready in under 10 minutes!
You’ll love this fresh and healthy and spinach, pear, and feta salad! It’s always one of the first things to disappear from my holiday table.
Find more holiday inspiration in the roundup of my best Thanksgiving side dishes.
Have you tried making this Sweet Potato Casserole Recipe with Marshmallows?
Tell me about it in the comments below! I always love to hear your thoughts. And tag me #theforkedspoon on Instagram if you’ve made any of my recipes, I always love to see what you’re cooking in the kitchen.
Traditional Sweet Potato Casserole Recipe with Marshmallows
- Preheat the oven to 350 degrees F and arrange the oven rack in the center position.
- Grease a large 9×13-inch casserole dish or baking dish. Set aside.
- Thoroughly wash, peel, and chop the sweet potatoes into 1-inch cubes. Transfer to a large pot or Dutch oven and cover with cold water. Bring to a boil, cover, and reduce heat to a simmer. Allow potatoes to cook for approximately 15 minutes, or until tender when pierced with a fork.
- As the potatoes cook, mix together the brown sugar, eggs, milk, butter, vanilla extract, ground cinnamon, and salt. Set aside.
- Drain the cooked sweet potatoes in a large colander and transfer to a large bowl. Use a potato masher to mash the sweet potatoes until smooth.
- Add the brown sugar and egg mixture to the mashed sweet potatoes. Mix thoroughly to combine.
- Transfer the mashed sweet potato mixture to your prepared casserole dish, using a rubber spatula to spread it into an even layer.
- In a separate bowl, combine the toasted pecans, all-purpose flour, brown sugar, melted butter, and a pinch of salt.
- Sprinkle half of the prepared pecan topping over the top of your sweet potatoes followed by approximately 2 cups marshmallows, and finally, the last of the pecan topping.
- Transfer to the oven and bake for 25-35 minutes, or until the tops of your marshmallows are golden brown and the potatoes are heated through.
(Nutrition information provided is an estimate and will vary based on cooking methods and specific brands of ingredients used.)