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Close up of the crock pot sweet potato casserole with a wooden serving spoon in it.

Easy Crock Pot Sweet Potato Casserole

Samantha Erb
My easy Crock Pot sweet potato casserole is made with canned yams, pecans, and marshmallows for a sweet classic holiday side dish. It's sweet, easy, and full of flavor!
4 from 4 votes
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Prep Time 10 minutes
Cook Time 4 hours
Total Time 4 hours 10 minutes
Course Slow Cooker, Thanksgiving Recipes
Cuisine American
Servings 6 to 8 Servings
Calories 610 kcal

Equipment

Ingredients

  • 40 ounces canned yams drained
  • ½ cup unsalted butter melted, divided
  • ½ cup brown sugar divided
  • 1 large egg beaten
  • ½ teaspoon cinnamon
  • ¼ teaspoon salt
  • ⅓ cup chopped pecans
  • 2 tablespoons flour
  • 8 ounces miniature marshmallows

Instructions
 

  • Spray the inside crock of a slow cooker with cooking spray.
  • Drain the canned yams, transfer them to a large mixing bowl, and mash them with a potato masher or the back of a wooden spoon. Add ¼ cup melted butter, 2 tablespoons brown sugar, egg, cinnamon, and salt. Mix well.
  • Spread the mashed sweet potato mixture evenly in the slow cooker. 
  • In a small bowl, combine the remaining brown sugar and butter, chopped pecans, and flour. Spread the mixture evenly over the top of the sweet potatoes.
  • Cover and cook on low for 3-4 hours. Sprinkle on the marshmallows in the last hour.

Notes

  • Use a butane torch lighter to brown the tops of the marshmallows for that classic baked look.
  • Mash the yams first with a potato masher or the back of a wooden spoon so the base is creamy and smooth before adding the other ingredients.
  • If prepping sweet potato casserole a day or two in advance, follow the recipe up until the sweet potato mixture is about to go into the slow cooker, then cover and refrigerate it. Add the pecan topping right before cooking.
  • Always spray the slow cooker insert with cooking spray to make cleanup easier.
  • Adding the marshmallows in the last hour gets them nice and gooey without breaking them down too much.
  • If the casserole is done before the rest of the meal, switch the Crock Pot to “warm."
  • Store leftovers in an airtight container in the fridge for up to 5 days.

Nutrition

Serving: 1Calories: 610kcalCarbohydrates: 104gProtein: 5gFat: 21gSaturated Fat: 10gPolyunsaturated Fat: 2gMonounsaturated Fat: 7gTrans Fat: 1gCholesterol: 68mgSodium: 162mgPotassium: 1611mgFiber: 9gSugar: 41gVitamin A: 777IUVitamin C: 32mgCalcium: 63mgIron: 2mg

This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.

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