There’s something about the smell of sweet potatoes and cinnamon baking in the oven that instantly takes me back to my grandma’s kitchen. Every Thanksgiving, without fail, she’d pull out her old, slightly chipped casserole dish and layer it with mashed sweet potatoes, a hint of spice, and those golden, gooey marshmallows. It was the first dish to disappear at our Friendsgiving potlucks and still sparks conversation today. I’ve put my own little spin on it over the years, but that nostalgic warmth remains. Whether you’re hosting or just bringing a dish, this Sweet Potato Casserole with Marshmallows is the one everyone will ask about.
A Holiday Essential, Made Easy
Sweet Potato Casserole with Marshmallows isn’t just a dish. It’s a tradition. This classic Thanksgiving side brings a little sweetness to your savory spread and adds that eye-catching golden top everyone gravitates toward. And the best part? It’s incredibly easy to make.
We keep things simple with ingredients you probably already have at home, and the results? Absolutely worth it. Whether you’re new to the kitchen or a seasoned cook planning your Thanksgiving menu, this casserole is a must-add.
Ingredients
- 4 cups mashed sweet potatoes (about 4 medium sweet potatoes)
- ½ cup brown sugar
- ¼ cup unsalted butter, melted
- ¼ cup milk
- 1 tsp vanilla extract
- ½ tsp cinnamon
- ¼ tsp nutmeg
- Pinch of salt
- 2 cups mini marshmallows
Instructions
- Preheat your oven to 375°F (190°C).
- Prepare the sweet potatoes: If you’re starting from whole sweet potatoes, peel, chop, and boil them until fork-tender (about 15–20 minutes). Then mash until smooth.
- Mix it up: In a large bowl, combine the mashed sweet potatoes, brown sugar, melted butter, milk, vanilla, cinnamon, nutmeg, and salt. Stir until well blended.
- Assemble the casserole: Pour the mixture into a greased 9×13-inch baking dish and smooth the top with a spatula.
- Add marshmallows: Evenly sprinkle the mini marshmallows over the top.
- Bake uncovered for 20–25 minutes, or until the marshmallows are puffy and golden brown.
Let it rest a few minutes before serving (if you can wait!). It’s the perfect mix of creamy, fluffy, and slightly crispy on top.
Make It a Whole Feast
Pair this casserole with other Thanksgiving sides like Air Fryer Carrots or Sweet Potato in Air Fryer. These dishes round out your table with texture, color, and even more flavor.
If you’re cooking for a crowd or doing a casual Friendsgiving, a dish like this can even double as a dessert. Yes, really! The marshmallow topping turns it into something almost pie-like.