The best ever Sweet Potato Casserole with Marshmallows AND buttery, brown sugar Pecan Topping! hello deeeeelicious!
This Sweet Potato Casserole has been our favorite recipe ever since we tasted it almost a decade ago and you will love that you can assemble it the night before Thanksgiving or Christmas! No Thanksgiving table is complete without this comforting classic!
Sweet Potato Casserole with Marshmallows AND Pecan Topping Recipe Video
Thanksgiving is going to be here in snap but you are going to be SO ready this year armed with my rave worthy Potatoes Au Gratin with Bacon, Slow Cooker Mashed Potatoes and now this Sweet Potato Casserole as well as all your other favorite Carlsbad Cravings Thanksgiving recipes! (Be sure to check my Thanksgiving recipes often as I will add more as I post them.)
Now let’s talk Sweet Potato Casserole. Sweet Potato Casserole is arguably more of dessert than a side dish, but I love that we get to eat “dessert” alongside our main meal once/twice a year. If you are looking for a savory Sweet Potato Casserole, this my friends, is not it, (instead try my Herb Scalloped Sweet Potatoes with Bacon and Gruyere,) but if you are looking for a best ever traditional Sweet Potato Casserole, then this IS it!
Now I’ve had my share of Sweet Potato Casseroles over the years. Some Sweet Potato Casseroles with Marshmallows, some Sweet Potato Casseroles with Pecan Topping, some better than others. But the one that left my husband and I oohing and ahhing is this Sweet Potato Casserole recipe with BOTH Marshmallows AND Pecan Topping.
The mad crushing for this Sweet Potato Casserole started one Thanksgiving almost ten years ago at a dear friend’s house. I politely scooped a small serving of her Sweet Potato Casserole onto my plate, as I liked the traditional side dish, but never loved it enough for a big scoop – other sides always took priority. But not this Thanksgiving, not with this Sweet Potato Casserole. It was rich and buttery, creamy and cinnamony complimented by crunchy, brown sugar pecans and ooey gooey marshmallows. It was love at first bite. Ever since that day, this Sweet Potato Casserole has been our one and only. I hope its yours too.
This Sweet Potato Casserole is a family recipe of my friend that goes way back in the day. So its safe to say its a tried and true favorite and a must have at every Thanksgiving and Christmas. And it’s not just one of those obligatory side dishes that you have to make because it is Thanksgiving – nay, its one off those eagerly anticipated side dishes that you get to make because it is Thanksgiving.
How to Cook Sweet Potatoes for Mashing
To make our Sweet Potato Casserole, we start by cooking our sweet potatoes.
- Peel and wash your sweet potatoes
- Cut sweet potatoes into 2″ chunks.
- Add potatoes to a Dutch oven and add just enough water to cover potatoes.
- Season with 1/2 teaspoon salt.
- Bring to a boil then reduce heat and simmer 10-15 minutes or until very tender when pierced with a fork; drain VERY WELL.
how to make Sweet Potato Casserole
Once our sweet potatoes are tender, this Sweet Potato Casserole is a simple whipping of cooked sweet potatoes, sugar, milk, a generous amount of butter, eggs, splashes of pure maple syrup and vanilla and enlivened by cinnamon, salt, nutmeg, cloves and a pinch of pepper. Because even a Sweet Potato Casserole should be loaded with multidimensional flavor. You whip your potatoes until they are fluffy and dreamy but not completely smooth and then pour into your casserole dish.
Pour your sweet potato mixture into a 13 x 9–inch baking pan that has been lightly coated with cooking spray. And now it’s time for the delectable Pecan Topping.
How to Make Pecan Topping for Sweet Potato Casserole
Now for our buttery, Brown Sugar Pecan Topping that takes MINUTES because we make it all in our food processor! Simply add pecans, maple syrup and vanilla extract to your food processor and pulse 3 times to slightly chop up pecans. Then add your flour, brown sugar, cubed butter and dashes of cinnamon, nutmeg and cloves and pulse until it resembles coarse pebbles. Evenly spread this Brown Sugar Pecan Topping over your sweet potatoes.
How long do I cook Sweet Potato Casserole?
Now that our Sweet Potato Casserole is assembled (marshmallows to be added later), we bake at 350 degrees F for 30 minutes or until golden. As the topping bakes the brown sugar caramelizes with the maple cinnamon butter and coats the toasted pecans for a truly magical texture flavor explosion in every bite. But wait, we’re not even done with the delicoiusness…
Next, we add our layer of mini marshmallows and either bake for 5 minutes for golden marshmallows or I prefer to bake closer to 10 minutes for more toasted ooey, goey marshmallows as pictured.
Now we’re done.
With one bite of this Sweet Potato Casserole, even a sweet potato hater will become a lover. The creamy sweet potato layer + the crunchy brown sugar butter Pecan Topping + the toasted, gooey marshmallow layer = texture flavor heaven!
How to prep Sweet Potato Casserole Ahead of Time
With all the chaos that can be Thanksgiving, its a life saver to prep as many recipes or parts of recipes ahead of time. To prep in advance:
- Make casserole as directed through spreading sweet potatoes in the dish. Let sweet potatoes cool completely, cover and refrigerate for up to 3 days.
- Prepare Brown Sugar Pecan Topping as directed and store in a sealed container or plastic bag in the refrigerator.
- When ready to bake, remove potatoes and Topping from the refrigerator at the same time. Uncover potatoes and bake at 350 degrees for 20 minutes. Add topping and continue to bake an additional 30 minutes OR until potatoes are completely warmed through. Add marshmallows and bake as directed.
Looking for more Potato Recipes?
- Company Mashed Potatoes
- Roasted Potatoes with Bacon and Parmesan
- Gruyere and Ham Potato Stacks
- Roasted Hasselback Sweet Potatoes
Want to try this Sweet Potato Casserole with Marshmallows AND Pecan Topping Crumble?
Pin it to your Thanksgiving, Sides or Holiday Board to SAVE for later!
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©Carlsbad Cravings by CarlsbadCravings.com

Prep Time | 30 minutes |
Cook Time | 65 minutes including boiling |
Servings | servings |
- 2 pounds yams/sweet potatoes peeled and chopped into 2” chunks
- 3/4 cup granulated sugar
- 1/3 cup milk
- 1 stick unsalted butter melted
- 1 tablespoon pure maple syrup not imitation
- 1 teaspoon vanilla extract
- 1 teaspoon salt
- 1 teaspoon ground cinnamon
- 1/4 tsp EACH ground nutmeg, ground cloves
- Pinch of pepper
- 2 eggs
- 1 1/4 cups pecans chopped
- 1 tablespoon pure maple syrup
- 1 teaspoon vanilla extract
- 1/3 cup flour
- 1 cup packed light brown sugar
- 1/2 cup butter cubed (1 stick)
- 1/2 teaspoon ground cinnamon
- 1/4 tsp EACH ground nutmeg, ground cloves
- 1 10 oz. bag mini marshmallows
Ingredients SWEET POTATO FILLING
Add later
BROWN SUGAR PECAN TOPPING
MARSHMALLOWS
| ![]() |
- Add potatoes to a Dutch oven and add just enough water to cover potatoes. Season with 1/2 teaspoon salt. Bring to a boil then reduce heat and simmer 10-15 minutes or until very tender when pierced with a fork; drain VERY WELL.
- Preheat oven to 350 degrees F.
- Add potatoes to large bowl (to use with hand held mixer). Add all “Casserole” ingredients except eggs and beat until combined.
- Add eggs; beat well, but don’t beat out all the lumps. You don’t want it to be perfectly smooth.
- Pour potato mixture into a 13 x 9–inch baking pan coated with cooking spray.
- Add pecans, maple syrup and vanilla extract to food processor. Pulse 3 times to slightly chop up pecans. Add all remaining topping ingredients and pulse until it resembles coarse pebbles. (See notes if you don’t have a food processor.)
- Evenly spread Brown Sugar Pecan Topping over potatoes and bake at 350 degrees F for 30 minutes or until golden.
- Remove casserole and line top with marshmallows (you won’t use the whole bag). Bake an additional 5-10 minutes (closer to 10 minutes for extra gooey marshmallows that spread together, my personal preference) then broil marshmallows until golden brown, watching carefully so they don't burn.
- Make casserole as directed through spreading sweet potatoes in baking pan. Let sweet potatoes cool completely, cover and refrigerate for up to 3 days.
- Meanwhile, prepare Brown Sugar Pecan Topping as directed and store in a sealed container or plastic bag in the refrigerator.
- When ready to bake, remove potatoes and topping from the refrigerator at the same time. Uncover potatoes and bake at 350 degrees for 20 minutes. Add topping and continue to bake an additional 30 minutes OR until potatoes are completely warmed through. Add marshmallows and bake as directed, 5-10 minutes.
**Brown Sugar Pecan Topping without a food processor: Add chopped pecans to a medium bowl and toss with maple syrup and vanilla. Add remaining ingredients and cut butter into brown sugar with pastry cutter, 2 forks, etc.
©Carlsbad Cravings Original adapted from Jill Peterson Reese
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judy says
Sure would like to print this recipe, but your site won’t let me……Help ?!?!
Jen says
Hi Judy, can you please describe the problem in more detail as I am not having this issue.
Cathy says
Click on the picture and then it gives you the option to print
Deb says
Can canned sweet potatoes be used instead and if so do I modify the sugar added to dish please? Thanks
Jen says
HI Deb! I have never used canned sweet potatoes for this but I am sure it should work fine. As long as you use unsweetened canned sweet potatoes then you shouldn’t need to adjust the sugar. Enjoy!
Deb says
Thanks! Happt Thanksgiving!
Kelly O'Brien says
Can you bake the sweet potatoes vs boiling them?
Jen says
Absolutely!
Kimberly says
Is there a way I can fix my pecan topping? I used a pastry cutter and must have over done it – the topping is very soft and mushy. I was thinking to add more flour and pecans?
Jen says
Hi Kimberly, the flavor will still be the same so I wouldn’t worry too much about it as it gets covered by the marshmallows. You can certainly add more pecans if you want.