Sweet Potato Souffle Pecan Streusel

Name: Sweet Potato Souffle Pecan Streusel
Prep time: 30 min
Cook time: 40 min
Total time: 70 min
Cuisine: American
Ingredients: 1/2 cup unsalted butter, room temperature (1 stick), plus 1 tablespoon for greasing; 5 medium sweet potatoes (yielding 5 to 6 cups flesh); 2 large eggs, room temperature; 1 cup granulated sugar or cane sugar; 1 1/2 teaspoons pure vanilla extract; 1/2 cup whole milk or unsweetened almond milk; 1/8 teaspoon kosher salt; 1 cup pecans, coarsely chopped; 1 cup brown sugar or coconut sugar; 1/2 cup all-purpose flour; 1/4 cup unsalted butter, softened (1/2 stick)

Recipe by Sam Rivera · Updated November 2025

There's something magical about a sweet potato souffle with a buttery, pecan-studded streusel on top-it's the kind of dish that turns a simple side into the star of your holiday table. Home cooks love it because it's lighter than marshmallow-topped casseroles but just as indulgent, with a crispy, caramelized topping that shatters with every bite. Perfect for Thanksgiving or any fall gathering, it pairs effortlessly with roasted meats and feels like a cozy hug on a chilly evening.

What Makes This Recipe Special

The streusel is a triple threat: coarsely chopped pecans for crunch, brown sugar for caramelization, and a touch of flour for structure-creating a topping that's part cookie, part praline.
Roasting the sweet potatoes first intensifies their natural sweetness and removes excess moisture, ensuring a silky, non-grainy souffle texture.
A splash of whole milk (or almond milk for a lighter touch) adds richness without overpowering the delicate egg custard.
The recipe cleverly uses the same butter twice: room-temperature butter for the souffle base and softened butter for the streusel, tying both layers together in flavor.

⏱ 70 mins

American

Servings 4

Ingredients

1/2 cupunsalted butter, room temperature (1 stick), plus 1 tablespoon for greasing

5 mediumsweet potatoes (yielding 5 to 6 cups flesh)

2 largeeggs, room temperature

1 cupgranulated sugar or cane sugar

1 1/2 teaspoonspure vanilla extract

1/2 cupwhole milk or unsweetened almond milk

1/8 teaspoonkosher salt

1 cuppecans, coarsely chopped

1 cupbrown sugar or coconut sugar

1/2 cupall-purpose flour

1/4 cupunsalted butter, softened (1/2 stick)

Nutrition

430 caloriesCalories

Per serving · Values are estimates

Instructions

Preheat oven to 350°F. Poke sweet potatoes several times with a fork and arrange on a parchment or foil-lined baking sheet. Bake until a knife pierces easily, 60 to 75 minutes, turning after an hour and baking up to 15 minutes more as needed.

Remove from oven and allow sweet potatoes to cool for 20 minutes. Keep oven on for later steps.

Grease an 8x11-inch or 9x13-inch ovenproof casserole with 1 tablespoon butter. Set aside.

Peel sweet potatoes and transfer flesh to a mixing bowl. Add the remaining 1/2 cup butter, eggs, granulated sugar, vanilla extract, milk, and kosher salt. Beat with a stand mixer or hand mixer until thoroughly combined.

Spread the sweet potato mixture evenly into the prepared casserole dish.

In a separate bowl, combine chopped pecans, brown sugar, flour, and 1/4 cup softened butter. Mix with a fork or fingertips until crumbly.

Sprinkle streusel mixture evenly over the sweet potato base.

Bake at 350°F for 40 minutes or until topping is golden brown and mixture is bubbling around the edges.

Allow to cool slightly before serving warm.

Essential Tips

Room temperature eggs

Cold eggs can cause the souffle to curdle or curdle the butter, so let them sit out for at least 30 minutes before starting. If you forget, submerge them in warm water for 10 minutes to bring them up to temp.

Peel while warm

Sweet potatoes are easiest to peel right after roasting when the skins slip off effortlessly. If they cool too much, run them under cold water for a few seconds to loosen the skins.

Don't overmix the base

Once you add the eggs and milk to the sweet potato mixture, fold gently to avoid deflating the eggs. Overmixing can lead to a dense souffle instead of a light, airy one.

Press the streusel firmly

After sprinkling the streusel over the souffle, gently press it down with your fingers or a spoon to help it adhere and toast evenly during baking.

Check for doneness early

Ovens vary, so start checking the souffle at 35 minutes. It's done when the edges are bubbly and the topping is deep golden brown. If the center jiggles slightly, it's perfect-it'll firm up as it cools.

Smart Swaps & Variations

Vegan Sweet Potato Souffle Swap the eggs for 1/2 cup unsweetened applesauce mixed with 1 teaspoon baking powder, use almond milk, and replace butter with coconut oil in the streusel for a dairy-free version that's just as decadent.

Spiced Pecan Streusel Add 1/2 teaspoon ground cinnamon and 1/4 teaspoon ground ginger to the streusel mixture for a warm, aromatic twist that pairs beautifully with the sweet potatoes.

Maple-Walnut Version Replace pecans with walnuts and use maple syrup instead of brown sugar in the streusel for a sophisticated, woodsy flavor that's perfect for a cozy winter dinner.

What to Serve With This

Herb-roasted turkey or ham for a classic Thanksgiving spread.
A sharp cheddar cheese board with dried apricots and crusty bread to balance the sweetness.
Warm mulled cider or a dry Riesling to complement the caramelized notes.
A dollop of whipped cream or a scoop of vanilla ice cream for an extra-decadent dessert twist.

Storage & Reheating

Storage

Store the souffle in an airtight container in the refrigerator for up to 3 days. The streusel will soften slightly but will crisp up again when reheated.

Reheating

Reheat the souffle in a 300°F oven for 15-20 minutes, uncovered, until warmed through. For a quicker option, microwave individual portions for 30-45 seconds, but avoid overdoing it to prevent a soggy topping.

Expert Chef Tips

For an even lighter texture, separate the eggs and whip the whites to stiff peaks before folding them into the sweet potato mixture in two additions. This creates a soufflé that's almost cloud-like.
Chill the streusel mixture in the fridge for 10 minutes before sprinkling it over the souffle-this helps it hold its shape better during baking and prevents sinking into the base.
Use a mix of orange and yellow sweet potatoes for a vibrant color and a subtle citrus note that brightens the dish without overpowering the classic flavors.

Equipment You’ll Need

Large baking sheet (for roasting sweet potatoes)
8x11-inch or 9x13-inch ovenproof casserole dish (glass or ceramic preferred)
Mixing bowls (medium and large)
Fork or potato masher (for blending the sweet potato mixture)
Pastry blender or fork (for mixing the streusel)

Nutritional Benefits

One serving provides a good source of vitamin A (120% DV) from the sweet potatoes, supporting eye health and immune function.
The pecans add heart-healthy monounsaturated fats and a dose of magnesium, which aids in muscle and nerve function.
Using whole milk boosts calcium content (15% DV per serving), while almond milk offers a lower-calorie alternative with added vitamin E.
This dish is naturally gluten-free if you substitute a gluten-free flour blend in the streusel, making it accessible for those with gluten sensitivities.

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Frequently Asked Questions

Can I make this ahead of time?

Absolutely! Assemble the souffle up to the baking step, cover it tightly with plastic wrap, and refrigerate for up to 24 hours. Bake it straight from the fridge, adding 5-10 extra minutes to the baking time. For best results, let it sit at room temperature for 20 minutes before baking.

What's the best size baking dish to use?

An 8x11-inch or 9x13-inch dish works best, as it gives the souffle enough depth for the custard to set without drying out. If you only have a smaller dish (e.g., 8x8-inch), reduce the baking time to 30-35 minutes and watch closely to avoid over-browning.

Can I freeze the souffle?

Yes, but the texture changes slightly after thawing. Freeze the baked souffle (uncovered) for 1 hour to firm it up, then wrap it tightly in foil or plastic and freeze for up to 2 months. Thaw overnight in the fridge before reheating. The streusel may lose some crispness.

What's the trick to avoiding a grainy texture in the souffle?

Roasting the sweet potatoes until completely tender is key-use a fork to test doneness, and if they're still firm, roast them another 5-10 minutes. After peeling, mash them well or blend them briefly in a food processor to eliminate any lumps before mixing with the other ingredients.

How do I substitute coconut sugar for brown sugar in the streusel?

Coconut sugar has a lower moisture content, so you may need to add an extra 1-2 tablespoons of softened butter to the streusel mixture to achieve the same crumbly texture. Taste it before baking-coconut sugar has a deeper, caramel-like flavor that pairs well with the pecans.

Can I use canned sweet potatoes?

While it's possible, fresh roasted sweet potatoes yield a better texture and flavor. If using canned, drain and mash them well, then spread them on a baking sheet to dry slightly in a 200°F oven for 15 minutes to remove excess moisture before mixing with the other ingredients.

Why is my streusel topping soggy instead of crispy?

This usually happens if the souffle isn't baked long enough or if it's covered while still warm. Bake until the edges are bubbling and the topping is deep golden brown-about 40 minutes. Let it cool for 10 minutes before serving to allow the topping to set.

Can I make this dish gluten-free?

Yes! Use a 1:1 gluten-free flour blend in place of all-purpose flour for the streusel. Ensure the blend contains xanthan gum for binding, or add 1/4 teaspoon of xanthan gum to the streusel mixture yourself. The texture will be slightly less crisp but still delicious.