This easy Sweet Potato Casserole recipe is topped with a brown sugar pecan toppings, and always steals the show on Thanksgiving. Best part is you can be prepared in advance for an easy make-ahead holiday side dish.

Want more Thanksgiving recipes? Try my Easy, No-Fuss Thanksgiving Turkey or Spatchcock Turkey, the Best Homemade Rolls, Cornbread Stuffing, or our Perfect Pie Crust!

A piece of the best Sweet Potato Casserole recipe being lifted out of a rectangle pan to serve.

Why I love this casserole:

  • The Topping – The topping on this casserole is made with butter, pecans, flour, and brown sugar. It's so much better than the marshmallow topping on sweet potato casserole (in my opinion!).
  • Make-Ahead – Want a stress-free Thanksgiving day? This whole casserole (as well as more of my Thanksgiving recipes) can be made a day or two in advance. Check out my Make Ahead Instructions at the end of the post for details!
  • Crowd Pleaser – This is a HIT with family and friends every single year. The potatoes are creamy, and the topping adds the perfect crunchy texture. It will become a new staple on your Thanksgiving table!

How to make Sweet Potato Casserole:

Cook Sweet Potatoes: Place sweet potatoes in a large pot and add enough water to the pot to cover the potatoes a little more than half way. Cover and bring to a boil, then simmer until fork tender. Drain, and place on a cutting board to cool. Once they are warm enough to handle, remove the skins and place them in a large mixing bowl.

Someone peeling the skins off of sweet potatoes on a cutting board.

Make Filling: Add eggs, evaporated milk, vanilla, sugar, salt, and butter and mash everything together until smooth. I start with a potato masher, and then use an electric mixer on low speed, for about 45 seconds, to get the mixture smooth (without over-mixing). Smooth into casserole dish.

Two images showing the process of making the filling for homemade Sweet Potato Casserole, before and after it's mixed.

Add Pecan Topping: Combine the topping ingredients– butter, chopped pecans, flour, and brown sugar–and sprinkle all over the top of your mashed sweet potato mixture.

Two images showing a homemade pecan brown sugar streusel in a bowl, then it being sprinkled on smooth and creamy sweet potatoes.

Bake: Place in the oven and bake for 35-40 minutes. Serve this sweet potato casserole with pecans alongside your favorite Thanksgiving recipes!

A Sweet Potato Casserole with pecan topping, golden brown and ready to serve.

Sweet Potato Casserole with Marshmallows:

To add a marshmallow topping instead, simply top the casserole with a layer of miniature marshmallows and bake for about 25 minutes, or until the marshmallows are puffy and browned.  You could also prepare this dish half and half with half pecan crumble mixture and half marshmallows.  For this method, cook with half of the crumble for about 15 minutes first, then remove from the oven, cover the other half of the casserole with marshmallows and continue baking.

Make Ahead, Storing, and Freezing Instructions:

To Make-Ahead: You can prepare this easy sweet potato casserole recipe 1-2 days in advance. First make the filling and smooth into your baking dish. Make the topping, but store seperatly. Add topping before baking. Here are some other great Make-Ahead Thanksgiving recipes.

To Store: Store sweet potato casserole covered in the refrigerator for 4-5 days.

To Freeze: Prepare the sweet potato casserole completely, but don't bake it. Cover with a double layer of aluminum foil and freeze for up to 3 months.  Thaw overnight in the refrigerator. Allow it to come to room temperature for 30 minutes on the counter before baking.

More Thanksgiving Staples:

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Recipe

A piece of the best Sweet Potato Casserole recipe being lifted out of a rectangle pan to serve.
Prep 20 minutes
Cook 35 minutes
Total 55 minutes
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Ingredients
 
 

For the topping:*

Instructions
 

  • Cook Potatoes: Place the sweet potatoes in a large pot.  Add enough water to the pot to cover the potatoes a little more than half way. (You will need at least 3-4 inches of water but the water will not completely cover the potatoes!) Bring the water to a boil and then turn the heat to a medium simmer.  Cover and simmer until they feel tender when poked with a fork. It may take 20-40 minutes to cook your sweet potatoes depending on the size of the potatoes, but you don't want them to be mushy.
  • Peel Potatoes: Drain water and place sweet potatoes on a plate or cutting board to cool down.  Once they are cool enough to handle, peel and discard the skin from the potatoes and place potatoes in a large mixing bowl.
  • Mix: Add eggs, evaporated milk, vanilla, sugar, salt, and butter and mash everything together until smooth. I start with a potato masher, and then use an electric mixer on low speed, for about 45 seconds, to get the mixture smooth.
  • Pour mixture into a lightly greased casserole dish. Anything around the size of an 8×11'' , 9×13'' or even a deep dish 10'' pie pan will work.
  • Make Topping: Add flour, brown sugar and pecans to a mixing bowl. Add butter and cut in with a fork or pastry blender until well combined. Sprinkle topping over sweet potato mixture. 
  • Bake at 350 degrees F for 35-40 minutes.
  • Store leftovers in the refrigerator for 4-5 days.

Notes

Topping: To add a marshmallow topping instead, top the casserole with a layer of miniature marshmallows and bake for about 25 minutes, or until the marshmallows are puffy and browned. 
Half Pecan Half Marshmallow Topping: Make ½ of the pecan topping and spread it over half the casserole – bake as directed. When it's about 5 minutes from being finished baking, top the other half with mini marshmallows and put back in the oven until they are golden and puffy.
Nut Allergy: Omit the nuts, or add about ½ cup rolled oats instead, for texture.
Make-Ahead Instructions: You can prepare this easy sweet potato casserole recipe 1-2 days in advance. First make the filling and smooth into your baking dish. Make the topping, but store seperatly. Add topping before baking. Here are some other great Make-Ahead Thanksgiving recipes.
Freezing Instructions: Prepare the sweet potato casserole completely, but don't bake it. Cover with a double layer of aluminum foil and freeze for up to 3 months.  Thaw overnight in the refrigerator. Allow it to come to room temperature for 30 minutes on the counter before baking.

Nutrition

Calories: 286kcalCarbohydrates: 43gProtein: 4gFat: 12gSaturated Fat: 5gPolyunsaturated Fat: 2gMonounsaturated Fat: 5gTrans Fat: 0.2gCholesterol: 54mgSodium: 197mgPotassium: 396mgFiber: 3gSugar: 26gVitamin A: 13106IUVitamin C: 2mgCalcium: 74mgIron: 1mg

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I originally shared this recipe October 2017. Updated November 2019 and November 2023.

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Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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Stephenie
1 year ago

5 stars
This is my only go to sweet potato casserole recipe. It always gets rave reviews, even from people who don’t LOVE sweet potatoes. Delicious every time.

Kristen
1 year ago
Reply to  Stephenie

5 stars
Jean please let me know which option you went with and how it turned out! I too wondered the same ☺️.

Jean
1 year ago
Reply to  Kristen

1/2 cup of oats and it was delicious. Perfectly chewy topping with the smooth sweet potato. Highly recommend this recipe- it was a hit at our potluck today!

Jamie
2 years ago

5 stars
Best sweet potato casserole I’ve had! Easy to make and the family all loved it!!

Maria
4 years ago

5 stars
This recipe was SO good. thank you for sharing it. Made it for Thanksgiving, everyone raved about it! Subbed regular milk for evaporated, it was delicious!

Marie
4 years ago

5 stars
Do I use unsalted butter?

Tamera
4 years ago

5 stars
My family and I love this recipe. I have made it each Thanksgiving for the last 3 years.

Sherry L Sulisz
4 years ago

If I prepare a day ahead of time, do I put the ziploc bag with the topping in the fridge?

Erin L.
4 years ago

So glad you asked this, I was wondering the same thing and thought the answer was yes, but checked comments to be sure 😊. Thanks!

Tiffany Barton
4 years ago

5 stars
If i choose to top with marshmallows do i also put brown sugar on the top?

johanna
4 years ago

hi! making this now and wondering, do you know how many cups of sweet potato I’d need? I bought my sweet potatoes but they’re fairly small.

Daria
4 years ago

Can I use canned yams for this recipe? I have 3 29oz cans that work gave me, I don’t want to waste it.

Jackie
4 years ago

Can I use regular milk instead of evaporated milk?

Meghan
4 years ago

If I wanted to half the recipe (smaller thanksgiving) how would I do that with the egg? 1.5?

Eva Gans
5 years ago

If I want to double this recipe, would I double everything? I made this last year and im starting to prepare for this year!