Slow Cooker Sweet Potato Casserole – Easy, Creamy & Perfect for Holidays

This Slow Cooker Sweet Potato Casserole is a warm, comforting, and irresistibly sweet side dish that’s perfect for Thanksgiving, Christmas, potlucks, and cozy family dinners. With tender sweet potatoes, buttery cinnamon flavor, and a delicious marshmallow–pecan topping, this crockpot version saves oven space while delivering all the classic holiday flavors you love.

Made with simple pantry ingredients and effortless slow cooking, this recipe guarantees a creamy, melt-in-your-mouth casserole every time.

Why You’ll Love This Recipe

Easy dump-and-cook preparation
No oven needed—perfect for busy holidays
Ultra creamy and naturally sweet
Customizable with toppings and flavor variations
Great for feeding a crowd

Ingredients

For the Casserole

4 large sweet potatoes, peeled and cubed
1/2 cup brown sugar
1/4 cup melted butter
1/4 cup milk
1 teaspoon vanilla extract
1/2 teaspoon cinnamon
1/4 teaspoon nutmeg
1/4 teaspoon salt

Topping

1 cup mini marshmallows
1/2 cup chopped pecans

Step-by-Step Instructions

Step 1: Load the Slow Cooker

Place the peeled and cubed sweet potatoes into the bottom of your slow cooker. Spread them out evenly for consistent cooking.

Step 2: Prepare the Sweet Mixture

In a small mixing bowl, combine:

brown sugar
melted butter
milk
vanilla extract
cinnamon
nutmeg
salt

Whisk until smooth and well blended.

Step 3: Coat the Sweet Potatoes

Pour this sweet, buttery mixture over the sweet potatoes.
Stir everything well to make sure every piece is coated.

Step 4: Cook the Casserole

Cover the slow cooker and cook:

LOW for 6–7 hours
or
HIGH for 3–4 hours

Cook until the sweet potatoes are soft, tender, and easily mashable.

Step 5: Mash the Sweet Potatoes

Using a spoon or potato masher, lightly mash the sweet potatoes right in the slow cooker.
Leave some texture, or mash completely if you prefer a smoother casserole.

Step 6: Add Marshmallows & Pecans

Sprinkle the mini marshmallows and chopped pecans evenly over the top.

Step 7: Melt and Toast

Cover again and cook on HIGH for 15–20 minutes, or until:

the marshmallows are melted
soft and gooey
light golden on top

Step 8: Serve Warm

Serve immediately for the best flavor and texture.
Perfect as a holiday side dish or comfort-food treat!

Variations & Tips

Variations

Healthier Version → Reduce the brown sugar or replace it with maple syrup.
No Marshmallows? → Add a crunchy oat streusel topping made from oats, flour, butter, and brown sugar.
Nut-Free → Omit pecans or swap with sunflower seeds.
Spicy Twist → Add a small pinch of cayenne pepper for subtle heat.
Creamier Texture → Mix in a splash more milk or a spoonful of cream while mashing.

Tips

For extra flavor, toast the pecans before topping.
If you like very smooth casserole, use an immersion blender after cooking.
Keep the lid on while topping heats so the marshmallows melt properly.
Double the recipe in a large slow cooker for feeding big crowds.

Serving Ideas

Serve with:

Turkey or ham
Roasted chicken
Stuffing
Green beans
Holiday dinner spreads

Slow Cooker Sweet Potato Casserole