Boston Market Sweet Potato Casserole Recipe


Sweet Potato Filling:

  • 5 lbs sweet potatoes (about 6 medium-sized)
  • ½ cup (1 stick) unsalted butter, softened
  • 2 large eggs, lightly beaten
  • 1 teaspoon ground cinnamon
  • ½ teaspoon ground nutmeg
  • 1 teaspoon vanilla extract
  • ¾ cup dark brown sugar
  • ¼ cup heavy cream
  • 1 teaspoon salt

Streusel Topping:

  • 1 cup all-purpose flour
  • 1 cup packed brown sugar
  • ½ cup rolled oats
  • ½ teaspoon ground cinnamon
  • ½ cup (1 stick) unsalted butter, cold and cut into cubes
  • 1 cup chopped pecans (optional)


Prep the Sweet Potatoes:

  • Preheat the oven to 350°F (175°C).
  • Wash and scrub the sweet potatoes. Pierce each potato several times with a fork.

You can either:

  • Bake: Wrap potatoes in foil and bake for 1 hour, or until tender when pierced with a knife.
  • Boil: Peel, cube, and boil potatoes until fork-tender (about 15 minutes). Drain thoroughly.

Make the Filling:

  • If baked: Allow potatoes to cool slightly. Peel and place the flesh in a large bowl.
  • If boiled: Place drained, cooked potatoes in a large bowl.
  • Mash sweet potatoes with softened butter until mostly smooth (a few lumps are okay).
  • Beat in the eggs, cinnamon, nutmeg, vanilla extract, brown sugar, heavy cream, and salt until combined.

Prepare the Streusel:

  • Combine flour, brown sugar, oats, and cinnamon in a medium bowl.
  • Use a pastry cutter or your fingers to cut in the cold butter until the mixture resembles coarse crumbs.
  • Stir in the chopped pecans (if using).


  • Spread the sweet potato mixture evenly in a greased 9×13 inch baking dish.
  • Sprinkle the streusel topping generously over the sweet potato layer.


  • Bake for 30-35 minutes or until the topping is golden brown and the filling is heated through.

Optional Marshmallow Topping:

  • For the classic Boston Market experience, top with mini marshmallows during the last 5 minutes of baking.


  • Sweet Potato Variety: Garnet or Jewel sweet potatoes are classic choices for their sweetness and vibrant color.
  • Smoothness: Adjust how much you mash the sweet potatoes for your desired texture.
  • Make-Ahead: Prepare the casserole (without topping) a day ahead. Store covered in the refrigerator. Add the topping and bake just before serving.
  • Customize It: Add a hint of ginger or other spices to the filling or topping.


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