Boston Market Sweet Potato Casserole (Copycat Air Fryer Recipe)
Description
This easy copycat Boston Market Sweet Potato Casserole bakes up creamy in the air fryer with a buttery brown sugar streusel topping — the perfect holiday side dish.
Ingredients
Sweet Potatoes
- 4 pounds sweet potatoes, peeled and cut into 1" pieces
- 4 tablespoons unsalted butter, ½ stick
- ¾ cup packed light brown sugar
- ½ cup heavy cream
- 1 teaspoon kosher salt
- 1 tablespoon pure vanilla extract
- 1 teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
Streusel Topping
- ½ cup all-purpose flour
- ¼ cup old-fashioned rolled oats, not instant
- 6 tablespoons packed light brown sugar
- 4 tablespoons unsalted butter, melted
- ½ cup chopped pecans
- ¼ teaspoon ground cinnamon
- 2 cups mini marshmallows, optional
Instructions
- Lightly spray ramekins or a small air-fryer-safe casserole dish with cooking spray. Cut the sweet potatoes into 1- to 2-inch pieces.
- Boil the sweet potatoes in a saucepan of water until fork-tender, about 10 to 15 minutes. Drain well.
- Mash the sweet potatoes until smooth, then fold in the butter, brown sugar, heavy cream, salt, vanilla, cinnamon, and nutmeg.
- Divide the mashed sweet potatoes evenly among the ramekins (or transfer to the casserole dish).
- In a bowl, combine the flour, oats, brown sugar, melted butter, pecans, and cinnamon until crumbly. Sprinkle over the sweet potatoes. Add marshmallows now if using.
- Air fry at 300°F for 10 to 15 minutes, until golden. Tent with foil if the top browns too quickly.
- Rest a few minutes, then serve warm.
Equipment
- Ramekins, any size
Notes
- Oven option: Bake at 350°F for 20–25 minutes.
- Make ahead: Prep filling and topping separately, refrigerate, and assemble before baking.
- Storage: Refrigerate up to 3–4 days; freeze unbaked up to 2–3 months.
Nutrition
Serving: 1ServingCalories: 589kcalCarbohydrates: 94gProtein: 6gFat: 22gSaturated Fat: 11gPolyunsaturated Fat: 2gMonounsaturated Fat: 7gTrans Fat: 0.5gCholesterol: 47mgSodium: 440mgPotassium: 871mgFiber: 8gSugar: 46gVitamin A: 32749IUVitamin C: 6mgCalcium: 117mgIron: 2mg