Martha Stewart’s Sweet Potato Casserole is a classic holiday side dish featuring creamy mashed sweet potatoes topped with a layer of golden, toasted marshmallows. Made with simple ingredients like butter, milk, and nutmeg, this comforting casserole is a staple for Thanksgiving dinners, Christmas celebrations, and cozy family gatherings.
Why Everyone Will Love This Recipe
This sweet potato casserole perfectly balances creamy, buttery sweet potatoes with a lightly caramelized marshmallow topping. The nutmeg adds warmth and depth, while the fluffy marshmallows create a nostalgic finish that both kids and adults enjoy. It’s easy to prepare, feeds a crowd, and pairs beautifully with classic holiday dishes.
What Is the Dish?
Sweet potato casserole is a beloved American holiday dish that sits somewhere between a side dish and a dessert. While sweet potatoes have been enjoyed in American cooking for centuries, the casserole-style preparation became especially popular during the 20th century as holiday menus embraced sweeter vegetable dishes.
The combination of sweet potatoes and marshmallows became a recognizable Thanksgiving tradition after marshmallow companies promoted recipes featuring the topping in the early 1900s. Fun fact: before marshmallows became the iconic topping, sweet potato dishes were often flavored with spices, butter, and sugar alone. Martha Stewart’s version keeps the nostalgic marshmallow topping while focusing on the natural flavor and creamy texture of the sweet potatoes.
Cooking Tips
- Choose sweet potatoes that are similar in size so they cook evenly.
- Salt the cooking water generously to season the potatoes from the inside.
- Allow excess moisture to evaporate after draining to prevent a watery casserole.
- Mash the sweet potatoes while they are still warm for the smoothest texture.
- Watch the marshmallows closely while baking since they can brown quickly.
Frequently Asked Questions
Can I Make Sweet Potato Casserole Ahead of Time?
Yes. Prepare the sweet potato mixture ahead, refrigerate, and add the marshmallows just before baking for the freshest topping.
Can I Use Canned Sweet Potatoes?
Yes, canned sweet potatoes can be used as a shortcut, but fresh sweet potatoes provide better flavor and texture.
Can I Replace Marshmallows With Another Topping?
Yes. A pecan streusel topping is a popular alternative for a less sweet version.
Why Add Nutmeg to Sweet Potato Casserole?
Nutmeg adds a warm, slightly sweet spice that enhances the natural flavor of the sweet potatoes.
Can I Make This Recipe Less Sweet?
Yes. Reduce added sugar if using sweeter varieties of sweet potatoes, or use fewer marshmallows on top.
How to Store
Store leftover sweet potato casserole in an airtight container in the refrigerator for up to 3 days. Reheat covered in a 350°F oven until warmed through. Individual portions can also be reheated in the microwave, though the marshmallow topping may soften.
How to Freeze
Freeze the sweet potato casserole without the marshmallow topping for the best texture. Store in a freezer-safe container for up to 2 months. Thaw overnight in the refrigerator, add fresh marshmallows, and bake until heated through and golden.
Ingredients
- 3 pounds sweet potatoes (about 8), peeled and cut into 1-inch chunks
- Coarse salt and freshly ground pepper
- ½ cup whole milk
- 4 tbsps butter
- ½ tsp ground nutmeg
- 2 cups mini marshmallows or chopped regular marshmallows
How to Make Martha Stewart's Sweet Potato Casserole
- Preheat oven to 375°F.
- Place sweet potato chunks in a large saucepan and cover with cold water by 1 inch. Add a generous amount of salt. Bring to a boil, then reduce heat and simmer for 15–20 minutes until tender when pierced with a knife.
- Drain the sweet potatoes and return them to the pan. Cook over medium heat, stirring, until excess moisture evaporates and a thin film forms on the bottom of the pan, about 2 minutes.
- Remove from heat. Add milk, butter, and nutmeg. Mash until smooth, then season with salt and pepper.
- Spread the sweet potato mixture evenly into a 2-quart baking dish.
- Cover the surface with marshmallows.
- Bake for 15–20 minutes, until the center is warmed through and the marshmallows are lightly browned.
- Serve warm as a classic holiday side dish.
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