Crispy Cubed Sweet Potatoes In Oven – Easy Side Dish

Roasting cubed sweet potatoes is a straightforward way to get a deeply flavorful side dish with minimal effort. The high, dry heat of the oven caramelizes the natural sugars, creating a crispy exterior and a tender, creamy interior. This method is more reliable than boiling or steaming, which can leave you with waterlogged results.

In this recipe, we use a precise temperature and toss the cubes with a small amount of oil and cornstarch. The cornstarch is a pro move—it absorbs surface moisture and helps achieve maximum crispness. You'll get consistently browned edges and a fluffy center every time.

The result is a versatile side that pairs with everything from roast chicken to grain bowls. And because the recipe is so basic, you can easily customize the seasonings to fit your meal. Let's get to it.

About the Ingredients

2 pounds (900g) sweet potatoes, peeled and cut into 1-inch cubes

About 3 medium sweet potatoes. For even cooking, cut uniform cubes. If you prefer, leave the skin on for extra fiber—just scrub well.

2 tablespoons (30ml) olive oil

Use a neutral oil with a high smoke point like avocado or canola if you prefer. The oil helps crisp the exterior.

1 tablespoon (8g) cornstarch

This is the secret to extra crispiness. You can substitute with arrowroot powder if needed.

1 teaspoon (5g) salt

Use fine sea salt or kosher salt. Adjust to taste, but this amount is a good baseline.

1/2 teaspoon (1g) black pepper

Freshly ground gives the best flavor. You can omit if you prefer a milder taste.

1/2 teaspoon (1g) smoked paprika (optional)

Adds a subtle smoky depth. You can substitute with regular paprika, chili powder, or a pinch of cayenne for heat.

Tips & Tricks

• Cut the sweet potatoes into even 1-inch cubes. Uneven sizes lead to some pieces being overcooked while others are still hard.
• Don't overcrowd the baking sheet. Leave space between the cubes so they roast instead of steam. Use two sheets if needed.
• Soak the cut cubes in cold water for 30 minutes, then dry thoroughly, for extra crispiness. This removes excess starch.

Step-by-Step Instructions

1. Preheat the Oven

Preheat your oven to 425°F (220°C). Line a large rimmed baking sheet with parchment paper for easy cleanup.

2. Prepare the Sweet Potatoes

Peel the sweet potatoes and cut them into 1-inch cubes. Try to keep them uniform so they cook evenly.

3. Toss with Oil and Seasonings

In a large bowl, combine the sweet potato cubes, olive oil, cornstarch, salt, pepper, and smoked paprika if using. Toss until every cube is evenly coated.

4. Arrange on the Baking Sheet

Spread the cubes in a single layer on the prepared baking sheet. Make sure they are not touching each other to allow for proper browning.

5. Roast for 20 Minutes

Place the sheet in the oven and roast for 20 minutes. The cubes will begin to soften and brown on the edges.

6. Flip and Roast Again

Remove the sheet from the oven and use a spatula to flip the cubes. This ensures even browning. Return to the oven and roast for another 15-20 minutes, until the cubes are golden brown and crispy on the outside, and tender inside.

7. Check for Doneness

The sweet potatoes are done when they are golden brown and crispy on the edges, and a fork easily pierces the center. The internal temperature should be around 205°F (96°C) for a soft, creamy texture.

8. Serve Immediately

Remove from the oven and serve hot. They are best enjoyed fresh, but you can keep them warm in a low oven for up to 30 minutes.

Delicious Variations

Spicy

Add 1/2 teaspoon of cayenne pepper or red pepper flakes along with the smoked paprika.

Herb

Toss with 1 tablespoon of fresh rosemary or thyme before roasting.

Maple Glaze

Drizzle with 1 tablespoon of maple syrup in the last 5 minutes of roasting for a sweet glaze.

How to Store Cubed Sweet Potatoes In Oven

Frequently Asked Questions

Try this recipe tonight and let me know how it turns out in the comments below. If you're looking for more easy side dishes, check out my roasted broccoli and garlic green beans.

Cubed Sweet Potatoes In Oven

Cubed sweet potatoes roasted in the oven until caramelized and crispy. A simple, healthy side dish ready in 40 minutes.

★★★★½ 4.8 (217 ratings)

15 minPrep time35 minCook time6Servings185 kcalCalories

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🧂 Ingredients

• 2 pounds (900g) sweet potatoes, peeled and cut into 1-inch cubes
• 2 tablespoons (30ml) olive oil
• 1 tablespoon (8g) cornstarch
• 1 teaspoon (5g) salt
• 1/2 teaspoon (1g) black pepper
• 1/2 teaspoon (1g) smoked paprika (optional)

📋 Instructions

1. 1Preheat the Oven — Preheat your oven to 425°F (220°C). Line a large rimmed baking sheet with parchment paper for easy cleanup.
2. 2Prepare the Sweet Potatoes — Peel the sweet potatoes and cut them into 1-inch cubes. Try to keep them uniform so they cook evenly.
3. 3Toss with Oil and Seasonings — In a large bowl, combine the sweet potato cubes, olive oil, cornstarch, salt, pepper, and smoked paprika if using. Toss until every cube is evenly coated.
4. 4Arrange on the Baking Sheet — Spread the cubes in a single layer on the prepared baking sheet. Make sure they are not touching each other to allow for proper browning.
5. 5Roast for 20 Minutes — Place the sheet in the oven and roast for 20 minutes. The cubes will begin to soften and brown on the edges.
6. 6Flip and Roast Again — Remove the sheet from the oven and use a spatula to flip the cubes. This ensures even browning. Return to the oven and roast for another 15-20 minutes, until the cubes are golden brown and crispy on the outside, and tender inside.
7. 7Check for Doneness — The sweet potatoes are done when they are golden brown and crispy on the edges, and a fork easily pierces the center. The internal temperature should be around 205°F (96°C) for a soft, creamy texture.
8. 8Serve Immediately — Remove from the oven and serve hot. They are best enjoyed fresh, but you can keep them warm in a low oven for up to 30 minutes.

👨‍🍳 Chef's Note: For the best results, don't skip the cornstarch—it's the key to that crispy texture. And remember, the cubes will continue to crisp up as they cool slightly, so don't over-roast.

Servings: 6

Cuisine: American

Course: Side Dish

Nutrition (per serving): 185 kcal · 2g protein · 36g carbs · 5g fat

Written by Marcus Okafor
Marcus writes about personal finance and investing, with a focus on helping young professionals build wealth from scratch. He breaks down complex concepts into simple, actionable strategies.