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+ servings
southern sweet potato casserole in a white baking dish.

Southern Sweet Potato Casserole

Mashed sweet potatoes blended with eggs, pure maple syrup, and cozy fall spices topped with a crunchy and sweet walnut streusel topping. This southern style sweet potato casserole will be the star of your Thanksgiving holiday dinner!
4.72 from 14 votes
Prep Time 15 mins
Cook Time 40 mins
Total Time 55 mins
Course Side Dish
Cuisine American
Servings 8 servings
Calories 369 kcal



Walnut Streusel Topping


  • Preheat your oven to 375 degrees Fahrenheit. Spray or butter a 9x13 baking dish and set aside.
  • Add the sweet potatoes, sugar, maple syrup, eggs, cinnamon, vanilla, nutmeg, cardamom, and salt to a large mixing bowl. Using a potato masher or large fork, mash the sweet potatoes together with the other ingredients until completely combined. Add the buttermilk and use a wire whisk to mix all of the ingredients until well combined.
  • Transfer the sweet potato mixture to your prepared baking dish and set it aside while you make the streusel topping.
  • Add the brown sugar, melted butter, flour, chopped walnuts, salt, and ground cinnamon to a small mixing bowl. Using a fork, mix the ingredients together until all of the flour is moistened and a crumbly texture is formed.
  • Spoon the streusel topping over the sweet potato mixture in an even layer. Bake the casserole in the preheated oven for 30-40 minutes until the casserole is golden and bubbly. Allow the casserole to cool for about 10 minutes then serve warm.


  • To boil sweet potatoes, add peeled and chopped sweet potatoes to a large stockpot, cover with water and boil until fork-tender. If your sweet potatoes are larger you may only need three.
  • Make sure you are using pure maple syrup and not maple-flavored syrup for the best flavor.
  • You can also use ½ cup regular whole milk instead of buttermilk.


Serving: 1servingCalories: 369kcalCarbohydrates: 50.7gProtein: 7.5gFat: 16.6gSaturated Fat: 4.7gCholesterol: 62mgSodium: 176mgPotassium: 626mgFiber: 4gSugar: 26.5gCalcium: 66mgIron: 2mg
Keyword fall side dishes, holiday sides, southern recipes, southern sweet potato casserole, sweet potato casserole, thanksgiving recipes, thanksgiving sides
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