This is THE BEST Southern Sweet Potato Casserole with Marshmallows. It’s the real deal with butter, brown sugar, and fresh mashed sweet potatoes all topped with melted marshmallows. This classic and old fashioned recipe will be a hit at your Thanksgiving, Christmas, or Easter table.
My Mom had a big sweet tooth. She would stash Little Debbie’s and chocolate bars around the house trying to ensure she’d have something sweet when the cravings kicked in. She was also very southern in her style of cooking, so you could expect a dash (or a lot) of sugar to go into most dishes including her macaroni and cheese. And it all tasted so good.
Southern Sweet Potato Casserole Marshmallows
So it’s no surprise that her famous sweet potato casserole with marshmallows is the real deal. Yup, I’m talking brown sugar AND real butter AND marshmallows, friends. I don’t cook with these ingredients a lot but when I do I do it RIGHT.
This recipes uses fresh sweet potatoes, hand mashed to perfection and big doses of cinnamon and nutmeg. Even though it looks fancy it’s surprisingly easy to put together with only a handful of basic ingredients…. many of which your probably already have.
This is a TRUE Southern Sweet Potato Casserole with Marshmallows and is downright delicious. It’s perfect for your Thanksgiving or holiday table.
The Best Sweet Potato Casserole with Marshmallows
I haven’t shared this Sweet Potato Casserole with Marshmallows recipe on Running in a Skirt because I worried that it doesn’t exactly fit into the healthy mold I try to create here. BUT I believe that you should eat and enjoy foods like this in moderation, especially when it is such a family favorite.
Making this old fashioned recipe during the holidays helps keep my Mom’s memory alive.
I believe in traditional family recipes and I believe in THIS recipe. I know if you try it you will feel the same.
Ingredients in the Sweet Potato Casserole with Marshmallows:
- Sweet Potatoes: I use fresh sweet potatoes as my Mom did. Peel them and cut them into 1-inch cubes. You can use canned but I think fresh sweet potatoes taste so much better.
- Brown Sugar: You need the real stuff for this recipe.
- Butter: Butter makes the potatoes rich and creamy.
- Cinnamon: I use a heavy hand with the cinnamon to get the flavor she did.
- Nutmeg: Nutmeg balances out the cinnamon.
- Milk: You can use whatever type of milk you keep in the house. I usually make this with 2%.
- Marshmallow: Mini marshmallows make this recipe so fun and southern.
Note: I occasionally will eat marshmallows, but they aren’t strictly vegetarian. If you have concerns try these vegan marshmallows.
How to Make Southern Sweet Potato Casserole with Marshmallows:
- To cook the potatoes for the casserole you boil them. Cover the potatoes with water and bring to a boil. Simmer until tender which should be around 20 minutes. You want them to be very soft.
- Preheat the oven to 400 degrees.
- Mash the sweet potatoes with a potato masher or mixer.
- Add the milk, brown sugar, butter, and spices. Taste and add more brown sugar if desired.
- Smooth the potato mixture into your Grandmother’s casserole dish. Add marshmallows to the top
- Bake until golden brown.
Casserole Variations & FAQ
- My Mom’s big secret is she made her recipe and THEN added even more brown sugar until it was absolutely sinful. If you really want to channel her sweet tooth, I suggest doing the same thing… but just for Thanksgiving. AND maybe Christmas too…. I promise not to tell.
- I recommend adding just a single layer of marshmallows on top to get the best cooked consistency and to keep them from melting into the casserole.
- You can also steam your sweet potatoes or bake them whole before mashing them. My Mom boiled them so that’s how I included it in this recipe.
Can Sweet Potato Casserole be made ahead of time?
YES! Make the mashed sweet potatoes and put them in a casserole dish. It can stay in the fridge up to 48 hours before your event. When you are ready to bake the sweet potato casserole with marshmallows ADD the marshmallow on top and bake according to the instructions. It will need to cook a few minutes longer to get it warm.
Can you freeze sweet potato casserole?
This dish also reheats and freezes well. To freeze the casserole make it up until the point you are going to add the marshmallows. Cover, freeze and store until you need it. It should keep 4-6 months.
Sweet Potato Casserole for 2?
This recipe can be very easily adjusted for the size of your party! You can half it to make a small batch sweet potato casserole for a couple or small family. When I make this for my extended family I easily double or even triple it.
It bakes easily in different size casserole dishes too. This is a pretty easy and forgiving recipe.
This one is truly from my heart guys, I hope you enjoy it as much as I do!
Need more Thanksgiving recipes? Try my 50 Delicious and Mainly Healthy Vegetarian Thanksgiving Dishes. It includes some great side dishes even turkey lovers will crave.
Mom's Best Sweet Potato Casserole with marshmallows
- 3 pounds sweet potatoes, peeled and roughly cubed
- 1 cup brown sugar
- 3 tablespoon butter
- 1 1/2 teaspoons cinnamon
- 1/2 teaspoon nutmeg
- 1/2 teaspoon salt
- 1 cup milk **
- 1 cup mini marshmallows*
- Boil potatoes in salted water until fork tender (about 20 minutes.)
- Preheat the oven to 400 degrees
- Mash the sweet potatoes with a potato masher until smooth.
- Add the brown sugar, butter, cinnamon, nutmeg and salt and mix until well combined. Add the milk a small amount at a time to reach desired consistency. Taste to decide if you want to add even more brown sugar like my Mom did.
- Put sweet potatoes in a casserole dish and top with a layer of the marshmallows.
- Bake for 15-20 minutes or until marshmallows are golden brown.