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Sweet Potato Casserole

11 Reviews

This easy Sweet Potato Casserole is topped with marshmallows and a brown sugar streusel topping. It’s so easy to make, and kids always love it! 

sweet potato casserole in white baking dish

Sweet Potato Casserole with Marshmallows

Our four-year-old just took the time to call Cade, with my supervision of course, to tell him that SHE just made the best dinner ever. It’s definitely not “dinner” as we are having more than just sweet potato casserole for dinner, and she most certainly did not make it all by herself, but the girl did quite a bit! And she loved it! 

Can all of us Moms have a moment of silence for a toddler who loved something that would become dinner? Not just ate it, but loved it! Alright, that could have something to do with the amount of sugar and marshmallows in this dish, but I won’t tell if you won’t. 

I used to hate “yams” at Thanksgiving because they were an awful orange, dripping with some weird syrup (gag!), and they tasted like grossness with burned, flat, hard marshmallows on top.

Now I know better. Now I know that it was the person bringing them that was the problem, bless their hearts (that’s what you say to make a mean thing sound better). Sweet potatoes are awesome, they just need to be cooked correctly and if you must do the marshmallow thang, well let’s just do it my way at least. 

Make the sweet taters into a souffle (easy peasy, so don’t get nervous on me) and then use both marshmallows and a brown sugar streusel on top. Trust me, your guests will be BEGGING for the recipe. Even our four-year-old agrees.

how to make sweet potato casserole with marshmallows on top

Sweet Potato Casserole Ingredients

To make this sweet potato casserole recipe with marshmallows, you’ll need: 

  • Sweet potatoes
  • Egg
  • Butter
  • Salt 
  • White sugar
  • Brown sugar
  • Cinnamon 
  • Vanilla extract
  • Milk
  • Mini marshmallows
  • All-purpose flour
  • Panko bread crumbs

sweet potato casserole with marshmallows in white baking dish

How to Make Sweet Potato Casserole

This sweet potato casserole recipe might not be as easy as dumping canned yams into a casserole dish and topping them with marshmallows, but it’s pretty easy nonetheless! Here’s how to make sweet potato casserole without pecans: 

  1. Bake the sweet potatoes until tender. 
  2. Peel the sweet potatoes, then mash them in a bowl. 
  3. Mix in the egg, butter, salt, sugars, cinnamon, milk, and vanilla. 
  4. Turn the mixture into a baking dish, then bake for 30 minutes. 
  5. Remove from oven and top with marshmallows and streusel topping, then return to oven for 20 minutes. 
  6. Let the sweet potato casserole cool for 10 minutes before serving it. 

Can I Use Canned Sweet Potatoes? 

Yes, you can make this sweet potato casserole recipe with canned sweet potatoes if desired. Just make sure to drain them really well before mashing them. 

Can I Add Nuts to This Sweet Potato Casserole? 

If you prefer your sweet potato casserole with nuts, feel free to sprinkle some on top when you add the marshmallows. Pecans and walnuts would both work nicely here. 

Can I Prep This in Advance? 

Want to make this marshmallow sweet potato casserole ahead of time? You can bake the potatoes and mash them days ahead and store in the fridge as well as the crumb topping in a Ziploc bag, or even a month ahead and store in the freezer. The day before, you can make the souffle and store in the fridge. Bake this sweet potato casserole day of in order to avoid yucky marshmallows

spooning out a serving of sweet potato casserole

Tips for Making Sweet Potato Casserole

When you first roast the sweet potatoes, you want them to be super soft before mashing them. I can usually tell when my sweet potatoes are finished because they start leaking juice once soft. 

Because the sweet potato mixture is like a souffle, you must include the egg. I don’t know of a way to omit the eggs and still have the texture come out right. 

If you don’t have mini marshmallows on hand, you’re welcome to chop up regular sized marshmallows and use those instead.  

More Thanksgiving Side Dishes: 

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The most AMAZING Sweet Potato Casserole with marshmallows and brown sugar crumb ohsweetbasil.com

Sweet Potato Casserole

4.37 from 11 votes
Prep Time: 1 hour
Cook Time: 50 minutes
Total Time: 1 hour 50 minutes
Servings: 4 -6 servings
This easy Sweet Potato Casserole is topped with marshmallows and a brown sugar streusel topping. It’s so easy to make, and kids always love it! 


  • 3 medium sweet potatoes
  • 1 large egg
  • 1/4 cup butter melted
  • 1 pinch of salt
  • 1/4 cup granulated sugar
  • 1/3 cup brown sugar
  • 1/2 teaspoon cinnamon
  • 1/2 teaspoon vanilla
  • 2 tablespoons milk or heavy cream (any milk will do)


  • 2 cups mini marshmallows
  • 1/4 cup butter cold and cut in cubes
  • 1/2 cup all-purpose flour
  • 1/2 cup brown sugar
  • 1/2 teaspoon cinnamon
  • 1/2 cup panko bread crumbs


Make the Casserole

  • Preheat the oven to 400 degrees F.
  • Place a piece of tin foil on the oven rack.
  • Pierce the sweet potatoes with a fork and bake for 45-60 minutes, or until tender.
  • Carefully peel the potatoes and turn the oven down to 350 degrees F.
  • Place the sweet potatoes in a large bowl and smash them until smooth.
  • Add the egg, butter, cinnamon, salt, sugars, vanilla and milk.
  • Using a handheld or standing mixer, beat everything together until smooth.
  • Pour the mixture into an 8x9-inch baking dish and bake for 30 minutes.
  • Remove from the oven and top with the marshmallows, then the crumb topping (see instructions below on how to make it), making sure to cover the marshmallows as much as possible, and bake for an additional 20 minutes.
  • Allow to cool for 5 minutes and serve.

Make the Topping

  • In a medium sized bowl, add the cold butter, flour, sugar and cinnamon.
  • Using a pastry cutter or fork, cut into the mixture until the butter is well incorporated.
  • I like to use my hands at the end.
  • Stir in the panko and set aside until you're ready to top the casserole.


Want to make this ahead? You can bake the potatoes and mash them days ahead and store in the fridge as well as the crumb topping in a ziploc bag or even a month ahead and store in the freezer. The day before you can make the souffle and store in the fridge. Bake the day of in order to avoid yucky marshmallows
Nutrition Facts
Sweet Potato Casserole
Amount Per Serving (1 g)
Calories 760 Calories from Fat 225
% Daily Value*
Fat 25g38%
Saturated Fat 15g94%
Trans Fat 1g
Polyunsaturated Fat 1g
Monounsaturated Fat 7g
Cholesterol 103mg34%
Sodium 392mg17%
Potassium 701mg20%
Carbohydrates 130g43%
Fiber 6g25%
Sugar 79g88%
Protein 8g16%
Vitamin A 24829IU497%
Vitamin C 4mg5%
Calcium 133mg13%
Iron 3mg17%
* Percent Daily Values are based on a 2000 calorie diet.



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Healthy Habits That Help Me!

About the authors

carrian feik cheney oh sweet basil

Cade and Carrian have three children and love to spend time together whether it’s vacationing or snuggled up on the couch for a good movie.

And this family especially loves to eat.

They love everything from the keep you fit and healthy to the get out your sweat pants indulgent and everything in between.

But most of all, they love the memories made, shared and treasured and it’s all thanks to a meal shared together with loved ones.

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Recipe Rating


  • This recipe is my absolute favorite recipe for sweet potato casserole! I make it every year for thanksgiving – and am going to make it again for Christmas. So so good.

    • Reply
    • Yay! Thank you so much for the feedback! It is a favorite of ours too!

      • Reply
  • If I am making this the day before, should I do the first part of baking the souffle the night before, or do all of the baking the day of? Thanks!

    • Reply
    • Make it all the day before!

      • Reply
  • Going on year 2 of making this delicious recipe for Thanksgiving! So good!

    • Reply
    • Yay!! I love to hear that!

      • Reply
  • Can I use egg whites instead of regular eggs?

    • Reply
    • Hi Sol, unfortunately you need whole eggs. 🙁

      • Reply
  • Is there a substitute I can use for the eggs or can I skip putting the eggs in the sweet potatoes?

    • Reply
    • Hi Taylor, unfortunately the eggs are needed in this recipe and it wont turn out the same without them. It’s like a soufflé.

      • Reply
  • I was wondering if you could tell me approximately how much sweet potato mash to use (in cups). I only have access to huge potatoes, and don’t want to use too much, or too little! Thanks!

    • Reply
    • Hi Anne, ours are usually pretty huge as well so you’re probably fine, but generally one potato is 1 1/2 to 2 cups 🙂

      • Reply
  • This looks so good! Do you think I could use canned sweet potatoes, or would that mess it up?

    • Reply
    • Thanks Hilary! You could definitely use canned, but drain it well!

      • Reply
      • I made this today, and it was delicious!! Everyone loved it. Thanks for the amazing recipe!

  • Your sweet potato casserole is making my mouth water… I love the marshmallow & brown sugar streusel topping, just beautiful!

    • Reply
    • Thanks so much Amy!! The whole family just loves it!

      • Reply
  • This is just straight up delicious!!! I want this on my table for sure!

    • Reply
  • This is about the only way I can eat sweet potato. 😉

    • Reply
  • So pretty! I don’t hate marshmallows! Mmmm!

    • Reply
    • Thanks so much, Julie!

      • Reply
  • I’m always excited to see new versions of classic family recipes because everyone has their own spin on them. This is great recipe inspiration. Thanks for sharing!

    • I love it too! I get so sucked into everyone’s modernized recipes and I love it!

      • Reply
  • I love the topping to sweet potato ratio!!! Delicious!!

    • Reply
    • Thanks, girl! I’m all about a topping. Notice there are no nuts… yeah the original plan was to use some but rethinking a new nut recipe haha

      • Reply

Healthy Habits That Help Me!