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Best Make-Ahead Sweet Potato Casserole with Easy Pecan Streusel

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This make-ahead sweet potato casserole with pecan streusel is creamy, perfectly sweet, and topped with a crunchy streusel that stays crisp even after reheating. It’s a crowd-pleasing side dish that converts skeptics and simplifies holiday prep.

Ingredients

Scale
  • 3 pounds sweet potatoes (about 4 medium-large), Garnet or Jewel varieties
  • 1/4 cup unsalted butter, melted
  • 1/3 cup packed light brown sugar
  • 2 large eggs, lightly beaten
  • 1/3 cup whole milk (or half-and-half)
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon ground nutmeg
  • 1/4 teaspoon salt
  • 1/2 cup all-purpose flour (spooned and leveled)
  • 1/2 cup packed light brown sugar
  • 1/4 cup unsalted butter, cold and cut into small cubes
  • 1 cup chopped pecans, lightly toasted
  • 1/2 teaspoon ground cinnamon
  • Pinch of salt

Instructions

  1. Preheat oven to 400°F (200°C). Scrub sweet potatoes clean and prick each with a fork. Roast directly on oven rack or on a foil-lined baking sheet for 45-60 minutes until tender. Let cool 15 minutes, then peel and mash until smooth.
  2. Reduce oven temperature to 350°F (175°C). To the mashed sweet potatoes, add melted butter, brown sugar, beaten eggs, milk, vanilla, cinnamon, nutmeg, and salt. Stir until well combined and smooth.
  3. In a medium bowl, whisk together flour, brown sugar, cinnamon, and salt. Add cold butter cubes and cut in with a pastry cutter or two forks until mixture resembles coarse crumbs with some pea-sized butter pieces. Stir in chopped pecans.
  4. Grease a 9×13-inch baking dish. Spread sweet potato mixture evenly into dish. Sprinkle pecan streusel evenly over the top without pressing down.
  5. Bake at 350°F (175°C) for 30-35 minutes until streusel is golden brown and mixture bubbles at edges. If topping browns too quickly, tent loosely with foil for last 10 minutes. Let rest 10 minutes before serving.
  6. For make-ahead: Cover assembled casserole tightly with plastic wrap or foil and refrigerate up to 24 hours. Let sit at room temperature 20 minutes before baking, then bake as directed, adding 5-10 extra minutes.

Notes

Roast sweet potatoes instead of boiling to avoid waterlogged texture. Keep streusel butter cold for crunch. Toast pecans for extra flavor. Let casserole rest 10 minutes after baking for cleaner slices. For dairy-free, use plant-based butter and oat milk. For gluten-free, use a 1:1 gluten-free flour blend. Can be frozen unbaked for up to 3 months.

Nutrition

Keywords: sweet potato casserole, make-ahead, pecan streusel, Thanksgiving side, holiday side dish, vegetarian, gluten-free option

Find it online: https://flurpchef.com/best-make-ahead-sweet-potato-casserole-with-easy-pecan-streusel/