Sweet potatoes contain a lot of moisture and natural sugar. If you crowd the baking sheet, they steam instead of brown, leaving you with limp sticks. Spreading them out in a single layer at 425 degrees Fahrenheit lets the surface moisture evaporate so the edges brown properly.
If you choose to air fry these instead of baking them, note that I base air fryer instructions on a standard 1700-watt basket model. Oven baking takes 20 to 25 minutes at 425 degrees Fahrenheit, while a 1700-watt air fryer cooks them in about 15 minutes at 400 degrees Fahrenheit.
Here is how the two cooking methods compare. Oven: 425 degrees Fahrenheit for 20 to 25 minutes, uses parchment paper, cooks a full sheet at once. Air Fryer: 400 degrees Fahrenheit for 15 minutes, requires batch cooking for a single layer, yields slightly crisper tips.
Step-by-Step Instructions
1. Preheat Oven
Set your oven to 425°F (220°C) and line a large baking sheet with parchment paper.
2. Slice Potato
Cut one sweet potato into uniform fry sticks about a quarter inch thick.
3. Season Fries
Toss the cut sweet potato in a bowl with olive oil, chopped rosemary, salt, and pepper.
4. Arrange Sheet
Spread the fries onto your lined baking sheet in a single layer with space between them.
5. Bake Fries
Bake for 20 to 25 minutes, turning every fry over halfway through cooking time.
6. Mix Dip
Whisk the Greek yogurt, lemon juice, chives, salt, and pepper in a small bowl while fries bake.
7. Chill Dip
Place the dip in the refrigerator until the hot sweet potato fries are ready to serve.
How to Store Sweet Potato Fries With Yogurt Chive Dip
Refrigerator
Store cooled fries and dip in separate sealed containers for up to three days.
Freezer
Freezing cooked sweet potato fries causes them to turn mushy when thawed, so freeze-storing is not recommended.
Reheating
Reheat fries on a baking sheet at 400°F for five minutes until warm and redried.
Variations
Air Fryer Option
Cook seasoned fries in a 1700-watt air fryer basket at 400°F for 15 minutes, shaking halfway through.
Frequently Asked Questions
Q: Why are my sweet potato fries soft instead of crisp?
They were likely piled too close together on the pan. Give them breathing room so steam escapes.
Q: Can I make the dip ahead of time?
Yes. Mixing the dip a few hours early allows the chive and lemon flavors to blend into the yogurt.

Crispy Sweet Potato Fries With Yogurt Chive Dip
Bake crispy sweet potato fries seasoned with fresh rosemary and salt, served with a tangy Greek yogurt and chive dip. Fast, easy, and reliable.
Ingredients
Instructions
- 1Preheat Oven — Set your oven to 425°F (220°C) and line a large baking sheet with parchment paper.
- 2Slice Potato — Cut one sweet potato into uniform fry sticks about a quarter inch thick.
- 3Season Fries — Toss the cut sweet potato in a bowl with olive oil, chopped rosemary, salt, and pepper.
- 4Arrange Sheet — Spread the fries onto your lined baking sheet in a single layer with space between them.
- 5Bake Fries — Bake for 20 to 25 minutes, turning every fry over halfway through cooking time.
- 6Mix Dip — Whisk the Greek yogurt, lemon juice, chives, salt, and pepper in a small bowl while fries bake.
- 7Chill Dip — Place the dip in the refrigerator until the hot sweet potato fries are ready to serve.




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