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Easy Make-Ahead Sweet Potato Casserole with Pecan Streusel

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This sweet potato casserole with pecan streusel is a quick, make-ahead friendly side dish that’s perfect for weeknights and holidays. Roasted sweet potatoes are mashed with butter, brown sugar, and warm spices, then topped with a crunchy, buttery pecan streusel.

Ingredients

Scale
  • 3 pounds sweet potatoes (about 4 medium-large)
  • 4 tablespoons unsalted butter, melted
  • 1/4 cup brown sugar, packed
  • 2 large eggs, lightly beaten
  • 1/2 cup milk (whole milk preferred)
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon ground nutmeg
  • 1/4 teaspoon salt
  • 1 cup pecan halves or pieces, roughly chopped
  • 1/2 cup all-purpose flour
  • 1/2 cup brown sugar, packed
  • 1/4 cup unsalted butter, cold and cut into small cubes
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon salt

Instructions

  1. Preheat oven to 400°F (200°C). Scrub sweet potatoes, prick with a fork, and roast on a baking sheet for 40-50 minutes until very soft. Let cool 10 minutes, then peel.
  2. In a large bowl, mash sweet potatoes until mostly smooth. Stir in melted butter, 1/4 cup brown sugar, eggs, milk, vanilla, 1/2 teaspoon cinnamon, nutmeg, and 1/4 teaspoon salt until well combined.
  3. In a medium bowl, combine flour, 1/2 cup brown sugar, 1/2 teaspoon cinnamon, and 1/4 teaspoon salt. Add cold butter cubes and chopped pecans. Use a pastry cutter or fingers to work butter into dry ingredients until mixture resembles coarse crumbs with some pea-sized butter pieces.
  4. Grease a 9×13-inch baking dish. Spread sweet potato mixture evenly. 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 is bubbly around edges. Let rest 5-10 minutes before serving. For make-ahead, cover and refrigerate up to 24 hours, then bake at 350°F for 35-40 minutes.

Notes

For best results, roast sweet potatoes instead of boiling to concentrate flavor. Toast pecans before using for deeper flavor. Use cold butter for streusel to ensure crispy clumps. Let casserole rest after baking to set properly. Can be assembled up to 24 hours ahead.

Nutrition

Keywords: sweet potato casserole, pecan streusel, make-ahead, Thanksgiving, holiday side dish, easy side dish

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