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Best Sweet Potato Casserole Recipe with Marshmallows and Pecans


  • Author: Mary

Ingredients

Scale

Sweet Potato Base:

  • 4 cups mashed sweet potatoes (about 4 large sweet potatoes)

  • 1/2 cup granulated sugar

  • 2 large eggs, beaten

  • 1/3 cup unsalted butter, melted

  • 1/2 cup milk (whole or 2%)

  • 1 tsp vanilla extract

  • 1/2 tsp salt

  • 1/2 tsp cinnamon (optional, for warmth)

Pecan Topping:

  • 1/2 cup packed brown sugar

  • 1/3 cup all-purpose flour

  • 1/3 cup melted butter

  • 1 cup chopped pecans

Optional Marshmallow Topping:

  • 1 to 2 cups mini marshmallows


Instructions

1. Prepare the Sweet Potatoes

  • Peel and cube 4 large sweet potatoes.

  • Boil in salted water for 15–20 minutes or until fork-tender.

  • Drain and mash until smooth. Let cool slightly before mixing with eggs.

2. Make the Filling

In a large bowl, combine:

  • Mashed sweet potatoes

  • Granulated sugar

  • Eggs

  • Melted butter

  • Milk

  • Vanilla

  • Salt and cinnamon

Mix until creamy and smooth.

3. Assemble the Casserole

  • Preheat oven to 350°F.

  • Grease a 9×13-inch baking dish.

  • Spread sweet potato mixture evenly in the dish.

4. Add the Toppings

In a medium bowl, stir together:

  • Brown sugar

  • Flour

  • Melted butter

  • Pecans

Sprinkle topping evenly over sweet potato mixture.

Optional: Add a layer of mini marshmallows now or halfway through baking for a golden-brown finish.

5. Bake

  • Bake uncovered at 350°F for 30–35 minutes until topping is golden and bubbly.

  • If using marshmallows only, bake for 25 minutes, then add marshmallows and bake 8–10 more minutes until browned.