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Crockpot Sweet Potato Casserole is a fun twist on a classic dish. Free up your oven and make it in the slow cooker.

Dishing a serving with a wooden spoon from the slow cooker
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Tasty pecans and marshmallows in every bite make this the perfect casserole to enjoy. We have a traditional Oven Baked Sweet Potato Casserole we love to make, but this recipe is a bit different because the potatoes are diced and not mashed.

Save oven space this holiday and make your favorite casserole in the slow cooker.

Which Sweet Potatoes to chose for this casserole?

Make sure to use fresh sweet potatoes that do not have any root growing off of them.

I like to use medium size sweet potatoes to make this delicious side dish recipe.


Ingredients needed for sweet potatoes casserole - sweet potatoes, butter, brown sugar, cinnamon, vanilla, pecan, marshmallows

Scroll down to the recipe card and the full recipe instructions.

How to Make Crockpot Sweet Potato Casserole:

The butter, brown sugar, cinnamon and vanilla extract mixed together in a small bowl.

Step 1 – Mix in a Small Bowl – Add the butter, brown sugar, cinnamon and vanilla extract and mix together.

The diced sweet potatoes placed in a slow cooker.

Step 2 – Place in Slow cooker – Put the cube sweet potatoes in a 4-6 quart crock pot.

The butter mixture poured on top of the sweet potatoes in the crock pot.

Step 3 – Add the butter mixture to the crock pot. Mix everything together and toss the sweet potatoes so they are coated in the butter mixture.

The chopped pecans poured on top of the sweet potatoes in the crock pot.

Step 4 – Add Chopped Pecans – Put the chopped pecans on top of the sweet potatoes and add the lid.

How Long to Cook Sweet Potato Casserole in a Crock Pot:

The sweet potatoes and pecans cooked in a cock pot.

Step 5 – Cover and Cook – Let the casserole cook on low for 7-8 hours. You can cook on high for 3-4 hours until the potatoes are soft and tender.

The marshmallow topped on the sweet potatoes in the crock pot.

Step 6 – Top with Marshmallows – During the last 10 to 15 minutes add the marshmallows and put the lid back on. You just want them to melt a little bit.

Crock Pot Sweet Potato Casserole Tips:

  • If you have a lot of other things to cook, it is helpful to do the prep work in advance. By going ahead and peeling and dicing the potatoes.
  • Make sure to peel the sweet potatoes entirely. The skin adds a toughness to the casserole so make sure to remove all the skin will peeling.
  • Dice the sweet potatoes into even pieces. This will ensure that the sweet potatoes cook evenly. Try to get them in as even as sizes as possible.
  • Leave the lid off at the end of cooking time. – I do remove the lid from the crock pot for the last 15-20 minutes so any extra moisture will cook off.

Variation Ideas:

  • Chopped Nuts – The pecan topping in the recipe is optional. It will also be good with any of your favorite type of nuts. Walnuts or almonds would be great too.
  • Marshmallows – We used mini marshmallows but you can use regular size marshmallows as well. I think either one would be delicious.
  • Mashed Sweet Potatoes – You can mash the sweet potatoes. This recipe leaves the potatoes diced. However, if you prefer you can use a potato masher and mash them.
  • Add Sweetness – If you like things sweeter, add a little bit of maple syrup or honey to the sweet potatoes before cooking.
Sweet potato casserole in the slow cooker with melted marshmallows

How to Store Leftovers:

You can store in the refrigerator for 3-4 days. Just make sure you use an air tight container with a lid.

How to Freeze

This sweet potato casserole can be placed in the freezer. Make sure to store in a freezer airtight container and place in the freezer. It will stay fresh for up to 3 months.

Dishing a serving with a wooden spoon from the slow cooker

Frequently Asked Questions

Why is the Top not Brown?

The top of this casserole will not brown when made in a crock pot. If your crock pot insert is oven safe. You can put the entire insert in the oven and broil for 3-5 minutes.
However, if you are using a crock pot with a ceramic insert. Do not put this insert in the oven as it will crack.

Can I substitute canned sweet potatoes for fresh sweet potatoes?

Canned or frozen sweet potatoes can be used in this recipe. If you are using frozen, I recommend you thaw them out first.

Can you Put Raw Sweet Potatoes in a Slow Cooker?

Yes, sweet potatoes cook great in a crock pot. Just place them in a crock pot raw and they’ll cook perfectly.

Why does sweet potato casserole get watery?

The sweet potatoes will release moisture as they cook so remove the lid the lasts 15-20 minutes of the cooking time to help evaporate extra moisture.

Should sweet potato casserole be firm?

Sweet potato casserole should be set and firm. It should not be runny.

How do you thicken up sweet potato casserole?

If you prefer a thicker casserole, add 2-3 tablespoons of flour to the sweet potatoes to help the sauce thicken up as they cook.

Can I make this ahead of time?

Yes you can! You can prep the whole dish the night before and keep covered in the refrigerator until ready to cook.

More Thanksgiving Crock pot Recipes:

We love serving this for Thanksgivng and if you love the idea of using your slow cooker, also try Crockpot Stuffing, Crock Pot Cheesy Potato Casserole, and Crockpot Green Bean Casserole Recipe

See our Full post on 50 Easy Thanksgiving Dinner Recipes, 37 Easy Thanksgiving Casseroles Recipes or check out our other Crockpot Side Dishes.

More Crockpot Sweet Potato Recipes:

I hope you enjoy this recipe! After you make it, please leave a comment and a star rating. I love hearing from you!

Crockpot sweet potato casserole

4.84 from 12 votes
Crock pot sweet potato casserole is a tasty blend of diced sweet potatoes coated in brown sugar. It's topped with pecans and marshmallows.
Prep Time 15 minutes
Cook Time 7 hours 15 minutes
Total Time 7 hours 30 minutes
Servings 8
Cuisine American
Course Side Dish
Calories 398


  • 4 lbs Sweet Potatoes peeled and diced
  • 1/2 cup Butter melted
  • 1/4 cup Brown Sugar
  • 2 tsp Ground Cinnamon
  • 1 tsp Vanilla Extract
  • 1/2 cup Pecans chopped
  • 1 1/2 cups Miniature Marshmallows
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  • Mix together the butter, brown sugar, cinnamon and vanilla extract together in a small bowl.
  • Place the diced sweet potatoes in a 4-6 quart crock pot. Stir in the butter mixture and toss the sweet potatoes to coat the sweet potatoes in the butter mixture. Top it with the chopped pecans.
  • Cover and cook on low for 7-8 hours or high for 3-4 hours until the potatoes are soft.
  • Place the marshmallows on top for the last 10-15 minutes to softly melt the marshmallows.
  • Serve it immediately and enjoy!

Nutrition Facts

Calories 398kcal, Carbohydrates 61g, Protein 4g, Fat 16g, Saturated Fat 8g, Trans Fat 1g, Cholesterol 31mg, Sodium 236mg, Potassium 806mg, Fiber 8g, Sugar 22g, Vitamin A 32535IU, Vitamin C 6mg, Calcium 87mg, Iron 2mg

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About the Author

Hi, I’m Carrie. Welcome to Eating on a Dime!

I’m on a mission to help you cook delicious meals without busting your budget. Together we are going to cook real food… for real families!

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Recipe Rating


  1. Diana says:

    5 stars
    Delicious my family doesn’t care for sweet potatoes no leftovers