Sweet Potato Casserole with Graham Cracker Streusel

A decadent sweet potato casserole topped with a crunchy graham cracker-pecan streusel and toasted marshmallows. This dish combines creamy maple-sweetened sweet potatoes with a chocolate-kissed topping for a delicious side dish or dessert.

8 servings
2 hr 35 min

Ingredients

  • 3 pounds orange-fleshed sweet potatoes
  • 5 pieces graham crackers
  • 1 cup pecans
  • teaspoons kosher salt
  • 6 tablespoons unsalted butter
  • ¼ cup whole milk
  • ¼ cup pure maple syrup
  • 2 teaspoons unsweetened cocoa powder
  • teaspoons vanilla extract
  • ½ teaspoon freshly ground black pepper
  • 1 cup mini marshmallows
  • 1 piece cast-iron skillet or baking dish

Cooking Instructions

  1. 1.

    Preheat oven to 425ºF. Arrange potatoes on a foil-lined rimmed baking sheet, then prick all over with a fork. Bake until the tip of a paring knife inserts easily into center of largest potato, 50-65 minutes, depending on size of potatoes. Let sit until cool enough to handle.

    65 min

  2. 2.

    Reduce oven temperature to 350ºF. Remove and discard potato skins. Transfer flesh to a large bowl and let cool completely. (You should have 4-4 1/2 cups.)

    30 min

  3. 3.

    Place graham crackers in a resealable plastic bag. Coarsely crush with your hands into 1/2"-1" pieces. Transfer graham crackers to a medium bowl. Add pecans and 1/4 tsp. salt. Mix in 4 Tbsp. butter to combine.

    10 min

  4. 4.

    Add milk, maple syrup, cocoa powder, vanilla, pepper, and remaining 2 Tbsp. butter and 1 1/2 tsp. salt to bowl with potato. Mash with a potato masher or fork until smooth.

    10 min

  5. 5.

    Transfer potato mixture to skillet or baking dish. Sprinkle graham cracker mixture over. Bake casserole until streusel is lightly golden, 20-25 minutes. Sprinkle marshmallows over, then continue to bake until marshmallows are lightly golden, 10-15 minutes more. Let sit 10-15 minutes. Serve warm.

    40 min

  6. 6.

    Potatoes can be baked and peeled 5 days ahead. Transfer to an airtight container and chill. Potato filling can be made 3 days ahead. Transfer to an airtight container and chill. Bring to room temperature before using.