Crispy Sweet Potato Fries

Crispy Sweet Potato Fries are perfectly crispy on the outside and tender inside, seasoned to perfection. A healthier alternative to regular fries that delivers maximum flavor and satisfying crunch without deep frying. Sweet potatoes carry considerably more natural sugar and moisture than russet potatoes, which is why this recipe layers two distinct techniques the standard baked fry doesn't need: a soak to draw out some of that excess surface moisture, and a light cornstarch coating that creates a genuinely crisp shell where sweet potato's higher sugar content would otherwise cause uneven, sticky browning. Thorough drying after soaking matters just as much here as with any other baked fry, but the stakes are slightly higher given sweet potato's naturally wetter flesh — any dampness left on the surface steams in the oven and softens what should be a crisp coating. The cornstarch is applied in a deliberately thin, even layer, since too much turns pasty rather than crisping cleanly. Genuine spacing on two separate baking sheets, rather than one crowded tray, prevents trapped steam from undoing all of that careful preparation. The result is a fry that's crisp at the edges, tender within, and genuinely satisfying without a deep fryer.

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Prep Time 15

Cook Time 30

Total Time 45

Servings: 4

Course: Side Dish

Cuisine: American

Calories: 220

Ingredients Method Notes

Ingredients

For the Sweet Potato Fries

800 g sweet potatoes cut into fries
30 ml olive oil
20 g cornstarch
6 g salt
3 g paprika
2 g garlic powder
2 g black pepper

Method

Prepare the Sweet Potatoes

Peel 800g sweet potatoes and cut into fries about 1cm thick, keeping sizes as even as possible for consistent bake time. Place in a large bowl, cover with cold water, and soak 15 minutes. Drain, then pat completely dry with kitchen towels—take this seriously; any dampness will steam in the oven and soften the fries.

Coat with Cornstarch

Return dry fries to the bowl and sprinkle 20g cornstarch over them. Toss thoroughly until each fry looks lightly dusted and no dry piles remain in the bowl; cornstarch creates a thin layer that bakes crisp instead of turning sticky. Shake off any heavy clumps—too much cornstarch can turn pasty.

Season and Oil

Preheat oven to 220°C (425°F). Add 30ml olive oil, 6g salt, 3g paprika, 2g garlic powder, and 2g black pepper. Toss until evenly coated—oil should lightly coat, not pool at the bottom.

Bake Until Crispy

Spread fries in a single layer on two parchment-lined baking sheets so fries don’t touch. Bake 15 minutes, flip each fry, then bake another 15 minutes until golden and crisp at the edges. If fries are tender but not crisp, add 3–5 minutes and check frequently—sweet potato browning accelerates at the end. Serve immediately.

Notes

Sweet potato's higher natural sugar content means it browns and softens differently than a russet potato under the same oven conditions, which is exactly why this recipe adds a cornstarch coating that regular baked fries elsewhere in this collection don't require. That thin starch layer gives the surface something structured to crisp against, rather than relying entirely on the sugar-heavy flesh to brown cleanly on its own.

The soak still matters here even though sweet potatoes don't carry the same surface starch concern as russets — it's specifically about drawing out some of the excess moisture that sweet potato flesh holds, which would otherwise interfere with both the cornstarch's ability to form an even coating and the oven's ability to crisp the surface.

Watching closely during the final few minutes of baking is genuinely important with sweet potatoes in a way it's slightly less critical with russets, since the natural sugars caramelize and can go from perfectly golden to overly dark within a short window once they start browning in earnest.