If you're looking for a quick side dish that's both easy and delicious, you'll love these crispy roasted sweet potatoes. With just a few pantry spices and one simple trick, you'll get that golden outside with a soft and tender inside-every time.
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They're ready in about 30 minutes, which makes them perfect for busy weeknights or when you just need something extra to round out dinner. I also make them in the air fryer when I don't want to heat up the whole oven, and they turn out amazing.
If you love easy veggie sides like this, you'll also want to check out the garlic butter roasted carrots for another simple go-to.
Ingredients you'll need
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon smoked paprika
- ¼ teaspoon garlic powder
- ¼ teaspoon onion powder
- 1 ½ teaspoons cornstarch
- 4 cups peeled and cubed sweet potatoes (about ½-inch cubes)
- 3 tablespoons olive oil
Step-by-step instructions
Mix your seasoning blend
Preheat the oven (or air fryer) to 425°F. In a small bowl, stir together the salt, pepper, paprika, garlic powder, onion powder, and cornstarch. This little cornstarch trick is what helps give the sweet potatoes that irresistible crispiness.
Coat the sweet potatoes
Place the cubed sweet potatoes in a large mixing bowl. Drizzle with olive oil and sprinkle the seasoning blend over the top. Toss until every piece is coated evenly-this helps them roast up golden on all sides.
Roast until crispy
Spread the potatoes in a single layer on a baking sheet. Don't overcrowd them or they'll steam instead of crisp. Bake for 15 minutes, flip with a spatula, then bake another 5-10 minutes. They should be soft inside but golden and crisp around the edges.
If you're using an air fryer, check them around the 20-minute mark and shake the basket halfway through.
Why they turn out crispy
- Cornstarch coating: soaks up extra moisture and helps browning
- High heat (425°F): caramelizes the natural sugars
- Spaced out cubes: lets hot air circulate and crisp each piece
Seasoning variations to try
Once you've got the basic recipe down, you can have fun with different flavors.
- Spicy kick: add cayenne pepper and cumin
- Herby: toss in rosemary and thyme before roasting
- Sweet: dust with cinnamon and drizzle with maple syrup after baking
Storage and reheating tips
If you have leftovers, store them in an airtight container in the fridge for up to 4 days. To reheat, spread them back out on a baking sheet and pop them into a hot 425°F oven for 10 minutes. The air fryer also works perfectly for reheating in just 5-7 minutes.
Skip the microwave-it makes them soggy instead of crispy.
Common mistakes to avoid
- Cutting uneven pieces → leads to some burnt and some undercooked
- Overcrowding the pan → potatoes steam instead of roast
- Too much oil → makes them greasy, not crisp
- Forgetting to flip → one side gets dark while the other stays pale
FAQs
Usually it's because of excess moisture or a crowded baking sheet. Make sure they're well-dried and spread out in a single layer.
Nope! The skin gets nice and crisp if you leave it on-just scrub them well.
Yes, but they're best fresh. Store leftovers in the fridge, then re-crisp them in a hot oven before serving.
Classic salt and pepper work great, but smoked paprika, garlic powder, or even a sprinkle of cinnamon take them up a notch.
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📖 Recipe
Crispy Roasted Sweet Potatoes in 30 Minutes
These crispy roasted sweet potatoes are golden on the outside, tender on the inside, and ready in just 30 minutes. Perfect for a quick side dish on busy weeknights!
Ingredients
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon smoked paprika
- ¼ teaspoon garlic powder
- ¼ teaspoon onion powder
- 1 ½ teaspoons cornstarch
- 4 cups peeled and cubed sweet potatoes (about ½-inch cubes)
- 3 tablespoons olive oil
Instructions
- Preheat oven or air fryer to 425°F (220°C).
- Mix salt, pepper, paprika, garlic powder, onion powder, and cornstarch in a small bowl.
- Place sweet potato cubes in a large bowl, drizzle with olive oil, and toss with the seasoning blend until coated.
- Spread sweet potatoes in a single layer on a baking sheet.
- Bake for 15 minutes, flip with a spatula, then bake another 5–10 minutes until golden and crisp.
- If using an air fryer, cook for about 20 minutes, shaking the basket halfway through.
Notes
For best results, don’t overcrowd the pan and make sure the sweet potatoes are cut into even pieces. Store leftovers in the fridge for up to 4 days and re-crisp in a 425°F oven or air fryer. Avoid microwaving, as it makes them soggy.
Nutrition Information:
Serving Size:
1 cupAmount Per Serving: Calories: 180Total Fat: 7gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 0mgSodium: 350mgCarbohydrates: 28gFiber: 4gSugar: 5gProtein: 2g
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