Martha Stewart Thanksgiving Sweet Potatoes Recipe

By anabelle

Fact checked by Edward Harrington

Updated October 30, 2026

Martha Stewart Thanksgiving sweet potatoes are the creamy, golden side dish I bring out when the table needs something rich and a little sweet. Soft mashed sweet potatoes, whipped with butter and maple, sit under a pecan streusel and a layer of mini marshmallows that puffs and browns in the oven. The texture is the point: silky underneath, crisp and toasty on top, with soft marshmallow in every bite. This version is an original adaptation inspired by Martha Stewart’s classic holiday style, not her verified recipe.

The whole thing takes 85 minutes from start to finish, including 25 minutes of prep and 60 minutes in the oven. It’s a straightforward side to put together, and the streusel can be made ahead if you want to spread out the work. It fits a Thanksgiving spread, a holiday dinner or a potluck where you need one dish that travels well and feeds a crowd. With 8 servings, it earns its space on the table.

Why This Martha Stewart Thanksgiving Sweet Potatoes Works

Two things make this version hold together. First, the sweet potatoes are boiled until just tender, then drained well and left to steam for 2 minutes so the mash stays thick instead of watery. Second, the mash is enriched with warmed milk and softened butter rather than cold, which keeps it smooth instead of seizing.

The topping does the rest. Cold cubed butter rubbed into flour and brown sugar gives you coarse crumbs with pea-sized pieces, and those bits crisp as the dish bakes. The marshmallows go on partway through, so they puff and turn golden without burning.

What You’ll Love About It

• Creamy Texture — The mash stays silky and rich without turning heavy or dense.
• Crisp Pecan Top — Toasted nuts give every spoonful a buttery crunch.
• Make-Ahead Friendly — You can assemble it a day early and bake on the day.
• Crowd-Sized Dish — One 9×13-inch pan feeds 8 people without extra work.

Ingredients

Here’s everything you need, split into the sweet potato filling and the pecan streusel topping.

For the Sweet Potato Filling

• 4 pounds (1.8kg) sweet potatoes — about 4 large, peeled and cut into 1-inch (2.5cm) chunks.
• 1/2 cup (113g) unsalted butter, softened, divided — 1 tablespoon goes to the baking dish, the rest into the mash.
• 1/2 cup (120ml) whole milk, warmed — warm it gently so it blends smoothly into the mash.
• 1/4 cup (60ml) pure maple syrup — use the real thing, not pancake syrup.
• 2 large eggs, lightly beaten — they help the filling set as it bakes.
• 1 teaspoon vanilla extract
• 1 teaspoon kosher salt
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon freshly grated nutmeg — fresh grating gives a much stronger flavor than pre-ground.

For the Pecan Streusel Topping

• 1/2 cup (63g) all-purpose flour
• 1/2 cup (100g) packed light brown sugar
• 1/2 teaspoon kosher salt
• 1/2 cup (113g) unsalted butter, cold, cut into small cubes — keep it cold so the streusel stays crumbly.
• 1 cup (100g) pecan halves, roughly chopped
• 1 1/2 cups (75g) mini marshmallows

Equipment

• 9×13-inch (23x33cm) baking dish — a deep glass or ceramic dish works well here.
• Large pot — big enough to hold the sweet potatoes under an inch of water.
• Colander — for draining the potatoes thoroughly.
• Potato masher or hand mixer — either gives you a smooth mash.
• Medium bowl and whisk — for mixing the streusel.
• Pastry blender — optional, but it makes quick work of the cold butter.

How to Make Martha Stewart Thanksgiving Sweet Potatoes

Step 1: Heat the Oven and Prep the Dish

Preheat the oven to 350°F (175°C). Butter a 9×13-inch (23x33cm) baking dish with 1 tablespoon of the softened butter, working it into the corners so nothing sticks. Set the dish aside while you cook the potatoes.

Step 2: Boil the Sweet Potatoes

Put the sweet potato chunks in a large pot and cover them with cold water by 1 inch. Bring the water to a boil over high heat, then reduce the heat to medium and simmer until the potatoes are tender when pierced with a knife, 15 to 20 minutes. Don’t overcook them, or they’ll soak up water and the mash turns out waterlogged.

Step 3: Mash and Steam Off Moisture

Drain the sweet potatoes well in a colander and return them to the warm pot. Mash with a potato masher or beat with a hand mixer on low speed until smooth, then let them stand for 2 minutes so excess steam escapes. That short rest gives you a thicker, more flavorful mash.

Step 4: Finish the Filling

Add the remaining 7 tablespoons (99g) softened butter, the warmed milk, maple syrup, eggs, vanilla, 1 teaspoon salt, cinnamon and nutmeg. Stir until fully combined and creamy, then taste and adjust the salt if needed. Spread the mixture evenly in the prepared baking dish.

Step 5: Mix the Streusel

In a medium bowl, whisk together the flour, brown sugar and 1/2 teaspoon salt. Add the cold butter cubes and rub them in with your fingertips or use a pastry blender until the mixture looks like coarse crumbs with some pea-sized pieces. Stop there — overworking it turns the streusel into a paste.

Step 6: Add Pecans and Top the Casserole

Stir the chopped pecans into the streusel. Scatter it evenly over the sweet potato mixture, covering the surface completely so every bite gets some topping. Don’t press it down; leave it loose so it crisps.

Step 7: Bake, Then Add the Marshmallows

Bake uncovered for 25 minutes, then pull the dish out and scatter the mini marshmallows over the top. Return it to the oven and bake until the marshmallows are puffed and golden and the filling bubbles at the edges, 10 to 15 minutes more. If the marshmallows start browning too fast, tent the dish loosely with foil.

Step 8: Rest Before Serving

Let the casserole rest for 10 minutes before serving so the filling sets. The center should be set and the topping crisp when it’s ready to scoop. If anything browns too quickly near the end, tent it loosely with foil.

What to Serve With It

• Roast Turkey — A classic holiday centerpiece that pairs with the sweet, buttery mash.
• Green Beans — A bright, crisp vegetable balances the richness.
• Cornbread Stuffing — Soaks up the maple and pecan flavors nicely.
• Cranberry Sauce — A tart spoonful cuts through the sweetness.

Tips for the Best Results

• Drain Completely — Let the colander sit a minute so no water pools in the mash.
• Warm the Milk — Cold milk can make the butter seize and the mash lumpy.
• Keep Butter Cold — For the streusel, cold cubes give you the crispest crumb.
• Watch the Marshmallows — They brown fast; stay nearby for the last 10 minutes.
• Taste Before Baking — Sweet potatoes vary, so adjust salt before the dish goes in.
• Don’t Overmix — Stop as soon as the filling is smooth and creamy.

Easy Variations

Swap the pecans for an equal amount of chopped walnuts or leave them out for a plain streusel. For a spiced version, add 1/4 teaspoon of ground ginger to the filling. If you want a less sweet top, cut the marshmallows to 1 cup (50g) and scatter them only over the center.

Storing and Reheating

Cover leftovers and refrigerate for up to 4 days. Freeze unbaked, without the marshmallows, for up to 2 months and thaw overnight in the refrigerator before baking. To reheat, cover with foil and warm in a 350°F (175°C) oven for 20 to 25 minutes, or microwave single portions for 1 to 2 minutes, until it reaches 165°F (74°C) in the center.

Nutrition (per serving)

These values are estimates per serving and will vary with your ingredients and portion sizes.

FAQs

Can I make this Martha Stewart Thanksgiving sweet potatoes recipe ahead of time?

Yes. Assemble the dish through the streusel step up to 24 hours in advance, cover and refrigerate. Add 10 minutes to the initial bake time to account for the cold dish.

What can I use instead of pecans?

Chopped walnuts or almonds work as a direct swap in the same amount. If you need a nut-free version, replace them with 1/2 cup (40g) of rolled oats for crunch.

How do I know the sweet potatoes are done?

A knife should slide through the chunks with no resistance after 15 to 20 minutes of simmering. If they’re still firm, give them a few more minutes, but stop before they start falling apart.

Why did my casserole turn out watery?

Usually it’s underdrained potatoes or a mash that wasn’t rested long enough to release steam. Drain well, let the mash stand for 2 minutes, and avoid overboiling the chunks.

Martha Stewart-Inspired Thanksgiving Sweet Potatoes

Print Recipe

Silky mashed sweet potatoes enriched with butter and a touch of maple syrup, finished with a buttery pecan streusel and mini marshmallows for a golden, bubbling top. This is an original adaptation inspired by Martha Stewart’s classic holiday style, not her verified recipe. The contrast of creamy centers and crisp, toasted topping makes it a standout side dish for Thanksgiving or any holiday table.

• Author: Anabelle McLean
• Prep Time: 25
• Cook Time: 60
• Total Time: 85
• Yield: 8 1x
• Category: Side Dish
• Method: Baking
• Cuisine: American

Ingredients

Scale 1x2x3x

• 4 pounds (1.8kg) sweet potatoes (about 4 large), peeled and cut into 1-inch (2.5cm) chunks
• 1/2 cup (113g) unsalted butter, softened, divided
• 1/2 cup (120ml) whole milk, warmed
• 1/4 cup (60ml) pure maple syrup
• 2 large eggs, lightly beaten
• 1 teaspoon vanilla extract
• 1 teaspoon kosher salt
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon freshly grated nutmeg

For the Topping

• 1/2 cup (63g) all-purpose flour
• 1/2 cup (100g) packed light brown sugar
• 1/2 teaspoon kosher salt
• 1/2 cup (113g) unsalted butter, cold, cut into small cubes
• 1 cup (100g) pecan halves, roughly chopped
• 1 1/2 cups (75g) mini marshmallows

Instructions

1. Preheat the oven to 350°F (175°C). Butter a 9×13-inch (23x33cm) baking dish with 1 tablespoon of the softened butter and set aside.
2. Place the sweet potato chunks in a large pot and cover with cold water by 1 inch. Bring to a boil over high heat, then reduce to medium and simmer until tender when pierced with a knife, 15 to 20 minutes; do not overcook or they will become waterlogged.
3. Drain the sweet potatoes well in a colander and return them to the warm pot. Mash with a potato masher or beat with a hand mixer on low speed until smooth, then let stand for 2 minutes to release excess steam.
4. Add the remaining 7 tablespoons (99g) softened butter, warmed milk, maple syrup, eggs, vanilla, 1 teaspoon salt, cinnamon, and nutmeg. Stir until fully combined and creamy; taste and adjust salt if needed. Spread the mixture evenly in the prepared baking dish.
5. Make the topping: in a medium bowl, whisk together the flour, brown sugar, and 1/2 teaspoon salt. Add the cold butter cubes and rub with your fingertips or use a pastry blender until the mixture resembles coarse crumbs with some pea-sized pieces.
6. Stir in the chopped pecans. Scatter the streusel evenly over the sweet potato mixture, covering the surface completely.
7. Bake uncovered for 25 minutes, then remove from the oven and scatter the mini marshmallows over the top. Return to the oven and bake until the marshmallows are puffed and golden and the filling is bubbling at the edges, 10 to 15 minutes more.
8. Let the casserole rest for 10 minutes before serving. The center should be set and the topping crisp; if the marshmallows brown too quickly, tent loosely with foil.

Notes

Storage: Cover leftovers and refrigerate for up to 4 days. Freeze unbaked (without marshmallows) for up to 2 months; thaw overnight in the refrigerator before baking. Make-ahead: Assemble through the streusel step up to 24 hours in advance, cover, and refrigerate; add 10 minutes to the initial bake time. Reheating: Cover with foil and warm in a 350°F (175°C) oven for 20 to 25 minutes, or microwave individual portions for 1 to 2 minutes.

Nutrition

• Calories: 498
• Sugar: 32g
• Sodium: 310mg
• Saturated Fat: 12g
• Carbohydrates: 62g
• Fiber: 6g
• Protein: 6g
• Cholesterol: 85mg

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