Sweet Potato Casserole with Marshmallows

4.53 from 202 votes

Sweet potato casserole with marshmallows is a must for any Thanksgiving table. This delicious family favorite features a crunchy pecan topping and marshmallows on top for irresistible flavor!

scooping sweet potato casserole from the dish
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This is the best sweet potato casserole!

This is a classic favorite dish to make for the holidays and it’s simply divine. You will definitely be back for seconds!

Sweet Potato Casserole is a holiday must make along with stuffing, mashed potatoes, gravy, cranberry sauce, glazed carrots, and green bean casserole.

Mashed sweet potato filling is topped with a crunchy brown sugar pecan layer and covered in mini marshmallows that are baked to golden brown perfection.

sweet potato casserole with marshmallows

Ingredients to make sweet potato casserole with marshmallows

  • sweet potatoes
  • brown sugar
  • butter
  • spices: salt, cinnamon, vanilla extract, and nutmeg
  • all purpose flour
  • pecan pieces
  • mini marshmallows
ingredients needed to make sweet potato casserole

How to make marshmallow sweet potato casserole

Step 1: Prepare the sweet potatoes by peeling them and cutting them into large chunks. Doing this will allow them to cook faster when you boil them instead of leaving them whole.

cutting sweet potatoes into chunks

Step 2: Place the sweet potato chunks in a large pot and cover with water. Bring to a boil and cook the sweet potatoes until they are fork tender and fall apart easily.

Step 3: Drain the sweet potatoes and add them back to the sauce pan. Mash with a potato masher.

Add the rest of the casserole filling ingredients: butter, brown sugar, salt, cinnamon, vanilla extract, and nutmeg and mix until well combined.

Step 4: In a separate bowl, make the pecan topping for the casserole. Stir together the melted butter, brown sugar, all purpose flour, salt, and pecan pieces until combined.

Step 5: Grease a 9 by 13 baking dish with cooking spray. Add the sweet potato filling and spread it out evenly in the dish.

Top the sweet potatoes with the pecan crumble in an even layer.

Step 6: Add the mini marshmallows over the pecan topping in an even layer, making sure to cover the entire top of the casserole.

Step 7: Bake the sweet potato casserole at 350 degrees for 25-35 minutes, or until bubbly and the marshmallows are golden brown on top.

We are going for those perfect toasty brown marshmallows that make for the most delicious bite!

Just make sure to keep a close eye on the casserole towards the end to ensure you get a nice toasty brown top without burning.

sweet potato casserole with marshmallows

While I used to only be a sweet potato and pecan kinda gal, this recipe changed my mind!

The salty crunchy pecan topping with the sweetness of the golden brown marshmallows is simply out of this world delicious.

My kids love this recipe and think it’s so fun to eat marshmallows for a meal!

sweet potato casserole with marshmallows and pecan topping

Storing & Reheating

  • Storing: Leftover casserole can be stored in an airtight container in the refrigerator for 4-5 days.
  • Reheating: Leftover sweet potato casserole can be reheated in the oven at 350 degrees, or in the microwave until heated through

If you’re asked to bring sweet potato casserole to your family’s Thanksgiving table, bring this. You will wow them all with your incredible cooking skills!

Sweet Potato Casserole With Marshmallows FAQs

Can I make this in advance?

Yes, you can prep this ahead of time. Make the sweet potato filling, and place in an airtight container in the refrigerator. Once you are ready to bake the casserole, add the pecan topping and marshmallows.

How can I save time on Thanksgiving?

The day before Thanksgiving, I will at least boil and mash my sweet potatoes, or make it all ahead to assemble the next day. This dish is a great one to prep ahead of time.

sweet potato casserole on a plate
scooping sweet potato casserole from the dish

You can’t go wrong with this classic holiday side dish! It will bring back all the nostalgia of childhood and is sure to impress your friends and family.

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scooping sweet potato casserole from the dish
4.53 from 202 votes

Sweet Potato Casserole with Marshmallows

By: Joy Shull
This classic sweet potato casserole with marshmallows is a must make side dish for Thanksgiving and the holidays!
Prep: 30 minutes
Cook: 35 minutes
Total: 1 hour 5 minutes
Servings: 12

Ingredients 

For the sweet potato filling

  • 4 large sweet potatoes, peeled and chopped into large chunks (around 9 cups worth)
  • ½ cup unsalted butter, melted
  • 1 cup brown sugar
  • ½ teaspoon salt
  • ½ teaspoon cinnamon
  • 1 teaspoon vanilla extract
  • ¼ teaspoon nutmeg

For the pecan topping

  • 4 tablespoons unsalted butter, melted
  • cup brown sugar
  • 2 tablespoons all purpose flour
  • ½ teaspoon salt
  • 1 ¼ cups finely chopped pecan pieces

For the marshmallow layer

  • 10 oz mini marshmallows

Instructions 

  • Peel and cut the sweet potatoes into large chunks and place in a large sauce pan. Cover with water and bring to a boil
  • Boil until the sweet potatoes are fork tender and easily pierced with a fork. They should fall apart easily
  • Drain the sweet potatoes and add them back to the sauce pan. Mash with a potato masher. Add the rest of the sweet potato filling ingredients: butter, brown sugar, salt, cinnamon, vanilla extract, and nutmeg and mix until well combined
  • In a separate bowl, make the pecan topping. Stir together the melted butter, brown sugar, all purpose flour, salt, and pecan pieces until combined
  • Grease a 9 by 13 baking dish with cooking spray
  • Add the sweet potato filling and spread out evenly
  • Spread the pecan topping evenly over the top of the sweet potatoes
  • Add the mini marshmallows over the top in an even layer
  • Bake the sweet potato casserole at 350 degrees for 25-35 minutes, or until bubbly and the marshmallows are golden brown on top. Watch closely towards the end to get the perfect golden brown without burning

Nutrition

Calories: 418kcal, Carbohydrates: 61g, Protein: 3g, Fat: 20g, Saturated Fat: 8g, Polyunsaturated Fat: 3g, Monounsaturated Fat: 8g, Trans Fat: 0.5g, Cholesterol: 30mg, Sodium: 263mg, Potassium: 340mg, Fiber: 3g, Sugar: 41g, Vitamin A: 11047IU, Vitamin C: 2mg, Calcium: 56mg, Iron: 1mg
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16 Comments

  1. This was absolutely the best Sweet Potato Casserole I’ve ever made/had! That layer of pecans was amazing! Thank you so much for sharing this recipe!

  2. This was awesome but we don’t like side dishes to be overly sweet so I made the sweet potato layer with only 1/4 cup butter and about 2T honey and it was the perfect sweet savory combo.

  3. I need to bake a head of time and bring it to my families house. Could I bake it before with the nut topping and when I get to my sisters could I brown the marshmallows last minute?

  4. Has anyone tried this with almond flour to replace the all purpose flour in the topping? Does it usually work for a crumble ?

  5. Can this be made with canned sweet potatoes? I’d love to make this for Thanksgiving but have a big can of sweet potatoes that I would like to use up.

  6. Hi! Planning on making this for thanks and prepping the day before. I see steps to keep it separate. Does that add extra cooking time since it will be cold from fridge?

    1. Nope, it won’t add any cooking time! I would just prepare the sweet potato part ahead of time and refrigerate it. Once you’re ready to bake it, place the filling in a baking dish, then make the pecan topping real quick and top it with that and the marshmallows and bake!

    2. @Joy Shull, just made for the first time hoping it comes out as good as it looks what a great recipe! I’m traveling can I add sweet potato filling to casserole dish w pecans and bake w marshmallows when I get there? Hour drive or to you think best to cook here first and reheat at my family’s? Sorry to bug your first time making traveling!