Old-Fashioned Sweet Potato Casserole

Total Time

Prep: 25 min. Bake: 45 min.


10 servings

Updated: Sep. 14, 2023
Prepare this comforting side dish with the popular marshmallow topping or choose from streusel, fruit or crunchy toppings. —Taste of Home Test Kitchen
Old-Fashioned Sweet Potato Casserole Recipe photo by Taste of Home


  • 4 pounds sweet potatoes (about 5 large), peeled and cubed
  • 1 cup 2% milk
  • 1/2 cup packed brown sugar
  • 6 tablespoons butter, softened
  • 1 large egg, lightly beaten
  • 1-1/2 teaspoons ground cinnamon
  • 1-1/2 teaspoons vanilla extract
  • 3/4 teaspoon ground allspice
  • 1/2 teaspoon salt
  • 1/4 teaspoon ground nutmeg
  • 18 large marshmallows


  1. Place sweet potatoes in a large saucepan; cover with water. Bring to a boil. Reduce heat; cover and cook until tender, 15-20 minutes; drain.
  2. Transfer to a large bowl and mash. Add milk, brown sugar, butter, egg, cinnamon, vanilla, allspice, salt and nutmeg; beat until smooth.
  3. Transfer to a greased shallow 2-1/2-qt. baking dish. Bake, uncovered, at 350° until heated through, 40-45 minutes. Top with marshmallows. Bake just until marshmallows begin to puff and brown, 5-10 minutes longer.
Old-Fashioned Sweet Potato Casserole Tips

How can you make a crunchy topping for Old-Fashioned Sweet Potato Casserole?

To make a crunchy topping, omit marshmallows and reduce brown sugar in potato mixture to 1/4 cup. (Here's the difference between light and dark brown sugar.) For topping, combine 3/4 cup all-purpose flour, 3/4 cup packed brown sugar, 3/4 cup chopped pecans and 1/2 cup melted butter in a small bowl. Sprinkle over mashed sweet potatoes. Bake at 350° until topping is browned, 50-55 minutes.

What makes this sweet potato casserole old-fashioned?

It's up for debate, but some might say the marshmallow topping makes it old-school. Or it could be due to its spot in Grandma's recipe box.

Can you make Old-Fashioned Sweet Potato Casserole ahead of time?

Absolutely! Make the potato mixture in advance, then wrap and refrigerate. Bring to room temperature and sprinkle with the nut topping or marshmallows before baking. Then, try more seasonal sweet potato recipes!

Rashanda Cobbins, Taste of Home Food Editor

Nutrition Facts

3/4 cup: 282 calories, 8g fat (5g saturated fat), 43mg cholesterol, 227mg sodium, 50g carbohydrate (30g sugars, 4g fiber), 4g protein.