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Close up of a spoon of sweet potato casserole covered in melted marshmallows.
5 from 2 votes
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Yield: 6 servings

Crockpot Sweet Potato Casserole

Crockpot sweet potato casserole is the perfect side dish for any fall dinner. Tender sweet potatoes are caramelized in a cinnamon, maple syrup and brown sugar sauce and then topped with gooey marshmallows!
Prep Time10 minutes
Cook Time3 hours
Total Time3 hours 10 minutes

Ingredients

  • 2 pounds sweet potatoes, peeled and diced
  • ½ cup melted unsalted butter
  • ¼ cup brown sugar
  • 2 tablespoons maple syrup
  • 2 teaspoons vanilla extract
  • 1 teaspoon cinnamon
  • ½ teaspoon nutmeg
  • ½ teaspoon ginger
  • ¼ teaspoon salt
  • 2 cups miniature marshmallows

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Instructions 

  • Spray your crockpot with a nonstick cooking spray. Or, for easier cleanup, use a crockpot liner.
  • Place all of the diced sweet potatoes in the bottom of the crockpot.
  • In a small bowl, add the melted butter, brown sugar, maple syrup, vanilla extract, cinnamon, nutmeg, ginger, and salt. Whisk until well mixed.
  • Pour the mixture over the sweet potatoes, and stir to combine.
  • Cook the casserole on low for 6 to 8 hours, or on high for 3 to 4 hours, until the sweet potatoes are tender.
  • 10 minutes before serving, remove the lid and cover the casserole in marshmallows. Wipe the lid dry, then put it back on. Keep cooking for 5 to 10 minutes, until the marshmallows are melted. Serve immediately.

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Notes

Storage: Leftover casserole will last in the fridge for up to 5 days. Make sure to store the casserole in an airtight container. We don’t recommend freezing sweet potato casserole. Freezing and thawing this recipe will give it a funny texture. 
Reheating: To reheat, cover the casserole in aluminum foil and place in a 350°F oven for 10 to 15 minutes, until heated through. You can also reheat in the microwave on 80% power in 30-second increments.
Wipe The Lid: When you add marshmallows to the casserole, make sure to thoroughly wipe the condensation off the crockpot lid. If the lid is still wet, it will drip and make the marshmallows soupy.
Pumpkin Pie Spice. If you want to save time or add a little bit of extra flavor, you can replace the cinnamon, nutmeg, and ginger with 2 teaspoons pumpkin pie spice
Serve At A Potluck: This is a great recipe to bring to a party or potluck. The key is to cook the casserole at home, but don’t add the marshmallows. Transport the casserole in the crockpot, and turn it on once you get to the potluck. Once hot, add the marshmallows and finish the recipe as directed.
Pecan Topping: You can add some toasted chopped pecans or walnuts on top when you add the marshmallows for an added crunch.

Nutrition

Serving: 1 serving, Calories: 377kcal, Carbohydrates: 58g, Protein: 3g, Fat: 16g, Saturated Fat: 10g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 4g, Trans Fat: 1g, Cholesterol: 41mg, Sodium: 318mg, Potassium: 547mg, Fiber: 5g, Sugar: 29g, Vitamin A: 21924IU, Vitamin C: 4mg, Calcium: 69mg, Iron: 1mg