This easy sweet potato casserole with marshmallows is a family favorite made easy with just a few simple ingredients! Sweetened condensed milk is used to make it extra creamy with the perfect amount of sweetness. It’s so good you will want a second helping!
Table of Contents
- Why You’ll Love This Sweet Potato Marshmallow Casserole
- Recipe Ingredients
- How To Make Sweet Potato Casserole with Marshmallows
- Tips and Variations
- What To Serve With This Easy Sweet Potato Casserole Recipe
- Can You Prepare Sweet Potato Casserole Ahead?
- How To Store Leftovers
- More Easy Thanksgiving Recipes
- Get the Recipe
Why You’ll Love This Sweet Potato Marshmallow Casserole
What makes this easy sweet potato casserole recipe truly the best? Here are a few reasons…
- Easy and Quick: First and foremost, this sweet potato casserole with marshmallows comes together in just a few easy steps with minimal effort!
- Make Ahead: Prepare this casserole a day in advance, pop it in the oven on Thanksgiving, and worry about something else on your busy day.
- Marshmallows: This perfectly spiced and sweetened sweet potato casserole comes topped with marshmallows that are melted and gooey with perfectly toasted tops. Absolute perfection!
- Irresistible Taste: Sweetened condensed milk adds the perfect sweetness and creaminess to this sweet potato marshmallow casserole. With some added warm spices, it’s the perfect holiday side dish!
Not a fan of marshmallows? Try this fabulous Thanksgiving side dish for sweet potato casserole with a pecan topping! If you need to save on oven space, try my easy crockpot sweet potatoes with marshmallows instead!
Made with simple and inexpensive ingredients, you will want to make this easy sweet potato casserole recipe over and over again. Check the recipe card at the bottom of the post for exact amounts.
- Sweet Potatoes: Peeled and cubed if boiling, or wrapped in foil if you plan to bake them.
- Sweetened Condensed Milk: This key ingredient makes this sweet potato marshmallow casserole extra creamy and perfectly sweet.
- Spices: Choose cinnamon and nutmeg, or a few dashes of pumpkin pie spice.
- Salt: A pinch of salt will balance the sweetness in this dish.
- Marshmallows: I use big, fluffy marshmallows, but mini mallows work as well. Measure the amount with your heart.
How To Make Sweet Potato Casserole with Marshmallows
This marshmallow sweet potato casserole recipe comes together in just a handful of steps. For detailed directions, scroll to the recipe card below.
- Sweet Potatoes: Peel, cube, and boil the sweet potatoes in a large pot until fork tender. Or bake in the oven and remove the peels.
- Mash: Use a potato masher, large fork or a ricer to mash the cooked sweet potatoes.
- Season: Mix in the melted butter, sweetened condensed milk, cinnamon, nutmeg and salt, stirring until smooth.
- Marshmallows: Transfer the sweet potato mixture into a greased 9×13 baking dish and top with marshmallows.
- Bake: Toast the sweet potato casserole at 350°F for 20 to 25 minutes, until the marshmallows puff up and turn golden brown. Serve and enjoy!
Tips and Variations
Here are a few tips to ensure this sweet potato casserole turns out perfectly!
- Sweetener: If you choose not to use sweetened condensed milk, feel free to use dark brown sugar, light brown sugar or maple syrup with a hearty splash of half and half or heavy cream.
- Lighter Texture: Whip an egg to the sweet potato casserole which creates an airy, fluffy bite. Or try sweet potato soufflé if you’d like.
- Fresh Unavailable? Though I recommend baking or boiling fresh sweet potatoes, you could use drained, canned sweet potatoes if need be. They will be sweeter, so sweeten slowly and taste as you go.
- Watch Closely: Keep an eye on the dish to ensure that the marshmallow topping browns but doesn’t burn. IF it burns, scrape off the burned layer completely including any charred bits and apply a new, fresh layer of marshmallows, and toast again.
- Baked vs Boiled: Either option works, but baked sweet potatoes tend to be more moist than boiled and then mashed sweet potatoes. Baked sweet potatoes also happen to be easier to prepare since you don’t have to peel the potatoes.
What To Serve With This Easy Sweet Potato Casserole Recipe
Sweet potatoes are so versatile, they play well with many other side dishes. Here are a few of my favorites:
- Favorite Holiday Proteins: I love this easy crockpot ham recipe, or impress your guests with baked ham with orange glaze! For the turkey lovers, try this step by step tutorial to make the best Thanksgiving turkey!
- Vegetables: Serve this dish with homemade green bean casserole from scratch, creamy baked brussel sprouts, or this easy jiffy corn casserole to round out a spectacular meal.
- Potatoes: What goes with potatoes? More potatoes! Try these garlic mashed potatoes or cheesy potato casserole with crispy topping.
Can You Prepare Sweet Potato Casserole Ahead?
Absolutely! This is a great holiday casserole to prepare a day or two in advance.
Make Ahead: Prepare casserole up to 48 hours in advance, but hold off on adding marshmallows. Instead, wrap tightly with foil and store in fridge. When ready to serve, remove from fridge and let casserole rest on the counter for at least 30 minutes, or up to an hour. Pop it into the oven with the foil on and cook for 20 minutes. Remove foil, add the marshmallows, and return to the oven until marshmallows are toasted.
Even if you’re not prepping the entire casserole ahead of time, sweet potatoes can be cooked up to 4 days in advance with no compromise in taste or texture. Cool cooked sweet potatoes to room temperature and store in the fridge in an airtight container.
How To Store Leftovers
This casserole is best served fresh, but leftovers can be stored to be enjoyed another day.
- Fridge: Store leftovers for up to 5 days in the refrigerator by tightly wrapping the casserole dish in plastic wrap or place in an airtight container.
- Reheat: When you reheat it, the marshmallows will likely evaporate a little. It will still taste delicious, but will look a little different. To reheat, replace plastic wrap with foil and bake in 350°F oven until warm. Or microwave individual servings in a microwave safe dish.
Easy Sweet Potato Casserole with Marshmallows
- 2.5 lbs sweet potatoes, peeled and diced, or baked and peels removed
- 8 tablespoons (1 stick) unsalted butter, melted
- 1 (14 oz) can sweetened condensed milk
- 1 tablespoon cinnamon
- ½ teaspoon nutmeg
- ½ teaspoon salt
- 1 (16 oz) bag large marshmallows, or mini marshmallows
- Preheat oven to 350°F. Spray a 9×13 casserole dish with non stick spray and set aside.
- In a large stock pot, add sweet potatoes and cover with water. Cover pot with lid, bring to a boil and cook until fork tender, about 15 minutes.
- Drain potatoes and transfer back to pot. Add butter, sweetened condensed milk, cinnamon, nutmeg and salt. Mash away until nice and smooth.
- Transfer the sweet potato mixture into the prepared baking dish and smooth out the top into an even layer.
- Line the top of the casserole with marshmallows and bake until marshmallows are lightly toasted, about 15 to 20 minutes.
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