Old Fashioned Sweet Potato Casserole Recipe
Introduction
Old Fashioned Sweet Potato Casserole is a comforting side dish perfect for holiday meals or cozy family dinners. With creamy mashed sweet potatoes, a touch of brown sugar, and a delightful marshmallow and pecan topping, this casserole is sure to become a favorite.

Ingredients
- 2 ½ pounds sweet potatoes (peeled, cut into 1-inch cubes)
- ¼ cup light brown sugar (packed)
- ¼ cup unsalted butter (softened)
- 1 teaspoon salt
- 1 teaspoon vanilla extract
- ½ cup pecans (chopped, divided)
- 2 cups mini marshmallows
Instructions
- Step 1: Preheat your oven to 375°F and grease a 9 x 13-inch casserole dish to prevent sticking.
- Step 2: Place the sweet potatoes into a large pot of boiling water.
- Step 3: Reduce the heat to low and let the sweet potatoes simmer until tender, about 10 to 15 minutes.
- Step 4: Drain the sweet potatoes and transfer them to a large mixing bowl. Mash them together with the brown sugar, softened butter, salt, and vanilla extract until smooth and well combined.
- Step 5: Fold in ¼ cup of the chopped pecans, then spread the sweet potato mixture evenly into the prepared casserole dish. Top with the mini marshmallows and sprinkle the remaining pecans over the top.
- Step 6: Bake in the preheated oven for 20 to 25 minutes, or until the casserole is bubbly and the marshmallows are golden brown.
Tips & Variations
- For a richer flavor, try adding a pinch of ground cinnamon or nutmeg to the sweet potato mash before baking.
- If you prefer a crunchier topping, toast the pecans lightly before adding them to the casserole.
- Swap mini marshmallows for chopped large marshmallows if mini ones are unavailable.
- To make it nut-free, simply omit the pecans or substitute with toasted coconut flakes.
Storage
Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or warm the casserole in the oven at 350°F until heated through, about 15 minutes.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make this casserole ahead of time?
Yes, you can prepare the mashed sweet potatoes and assemble the casserole a day in advance. Cover it tightly with foil and refrigerate. Bake it the next day, adding a few extra minutes to the baking time if chilled.
Can I use frozen sweet potatoes instead of fresh?
Frozen sweet potatoes can be used, but be sure to thaw and drain any excess moisture before mashing to avoid a watery casserole.
PrintOld Fashioned Sweet Potato Casserole Recipe
This Old Fashioned Sweet Potato Casserole is a classic holiday side dish featuring tender mashed sweet potatoes mixed with brown sugar, butter, and vanilla, topped with crunchy pecans and gooey mini marshmallows. Baked to golden perfection, it’s a comforting and nostalgic treat perfect for family gatherings.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 8 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American
Ingredients
Sweet Potato Mixture
- 2 ½ pounds sweet potatoes, peeled and cut into 1-inch cubes
- ¼ cup light brown sugar, packed
- ¼ cup unsalted butter, softened
- 1 teaspoon salt
- 1 teaspoon vanilla extract
- ¼ cup pecans, chopped
Topping
- 2 cups mini marshmallows
- ¼ cup pecans, chopped
Instructions
- Preheat Oven and Prepare Dish: Preheat your oven to 375°F (190°C) and grease a 9 x 13-inch casserole dish to prevent sticking.
- Cook Sweet Potatoes: Place the peeled and cubed sweet potatoes into a large pot of boiling water. Reduce heat to low and simmer until the potatoes are tender, approximately 10-15 minutes.
- Drain and Mash: Drain the cooked sweet potatoes well and transfer them into a large mixing bowl. Mash the sweet potatoes thoroughly while adding in the brown sugar, softened butter, salt, and vanilla extract until smooth and evenly combined.
- Add Pecans and Assemble: Fold in ¼ cup of chopped pecans into the mashed sweet potato mixture. Spread this mixture evenly in the prepared casserole dish. Then, sprinkle the top with the mini marshmallows and the remaining ¼ cup chopped pecans.
- Bake the Casserole: Place the casserole in the preheated oven and bake for 20-25 minutes, or until the sweet potatoes are bubbly and the marshmallows are puffed and lightly golden brown on top.
Notes
- For an extra crunchy topping, you can toast the pecans lightly before adding them.
- If you prefer a less sweet casserole, reduce the amount of brown sugar slightly.
- Make sure to drain the sweet potatoes well after boiling to avoid a watery casserole.
- You can prepare this dish a day in advance; assemble and refrigerate, then bake before serving.
- Leftovers can be stored covered in the refrigerator for up to 3 days and reheated in the oven.
Keywords: sweet potato casserole, holiday side dish, baked sweet potatoes, marshmallow topping, pecan topping, classic casserole

