Crispy Air Fryer Sweet Potato Fries with Homemade Chili BBQ Sauce: Your Ultimate Guide
Imagine perfectly crispy, richly seasoned sweet potato fries, boasting a vibrant orange hue and an irresistible crunch. These aren’t just any fries; they’re a healthier, homemade delight prepared effortlessly in your air fryer. With the right blend of spices, each bite is a burst of flavor, far surpassing any store-bought alternative. Best of all, these air fryer sweet potato fries offer a significantly lower calorie count compared to their deep-fried counterparts, making them a guilt-free pleasure!
I distinctly remember the day my husband surprised me with my very first air fryer. Initially, I was curious but skeptical about how much I’d truly use it. Oh, how wrong I was! That appliance has transformed into an indispensable kitchen essential. From baking fluffy sandwiches and decadent brownies to, of course, whipping up batches of golden fries, it’s a constant companion in my culinary adventures. It has undeniably revolutionized the way I approach quick, delicious, and healthier meals.
Achieve perfectly crispy sweet potatoes in your air fryer, generously coated with a savory and aromatic spice rub! Elevate your snack or side dish experience by serving them alongside a vibrant sweet chili or smoky BBQ sauce for that ultimate finishing touch.
This delightful recipe has been thoughtfully adapted from the fantastic Dutch blog, Culi-sandra.

Key Ingredients for Perfect Air Fryer Sweet Potato Fries
Crafting the best sweet potato fries starts with understanding your ingredients. Here’s a closer look at what makes this recipe truly special:

- Sweet Potato – While pre-cut sweet potato fries are available, making them fresh at home is incredibly rewarding and ensures superior flavor and texture. For this recipe, I chose to peel the sweet potatoes, which gives a smoother fry. However, if you prefer a more rustic approach and extra fiber, simply scrub them thoroughly and leave the skin on. The key is to select firm, unblemished sweet potatoes.
- Cornstarch – This is your secret weapon for achieving that coveted crispiness! Unlike regular potatoes which are rich in starch, sweet potatoes have a lower starch content, making them naturally less prone to getting super crispy. By adding cornstarch to your spice mixture, you create a thin, starchy coating that crisps up beautifully in the air fryer, delivering an irresistible crunch.
- Garlic Powder & Chili Powder – These spices form the backbone of our flavorful seasoning blend. Garlic powder provides a warm, savory depth, while chili powder adds a subtle warmth and a touch of smoky complexity. Feel free to adjust the amount of chili powder to your preferred spice level, or even add a pinch of smoked paprika or cumin for extra flavor dimensions.
- A Touch of Oil (Optional but Recommended) – Although the air fryer drastically reduces the need for oil, a tiny amount (like a teaspoon or two of olive or avocado oil) can help the spices adhere better and promote an even crispier, golden-brown finish. This step is optional but highly recommended for optimal results.
Step-by-Step Guide to Crispy Air Fryer Sweet Potato Fries
Follow these simple steps to create perfectly seasoned and deliciously crispy sweet potato fries that will impress everyone at your table!
Step 1: Prepare and Cut the Sweet Potatoes

Begin by thoroughly peeling or scrubbing your sweet potatoes. Once cleaned, halve them lengthwise and then slice them into uniform, thin strips, resembling classic french fries. The key to even cooking and maximum crispiness is consistency in size and thickness. Avoid cutting them too thick, as this can lead to soft centers, or too thin, which might cause them to burn quickly. Aim for about ¼ to ½ inch thick.
Step 2: Season the Sweet Potato Fries for Flavor & Crunch

- First, ensure your cut sweet potato fries are dry. Pat them thoroughly with a paper towel to remove any excess moisture, which helps the cornstarch and spices adhere better.
- Place the sweet potato fries into a large mixing bowl. Add the cornstarch evenly over them.
- Next, sprinkle the garlic powder over the sweet potatoes.
- Follow with the chili powder, distributing it thoroughly.
- Mix everything very well. For the best, most even coating, here’s a professional tip: Place the fries, cornstarch, and all the dry herbs into a large plastic bag (a Ziploc bag works perfectly). Seal the bag, leaving a little air inside, and shake vigorously for 30-60 seconds. This method ensures every single fry is beautifully and evenly coated with a thin layer of cornstarch and spices, leading to superior crispiness.
Step 3: Air Fry for Ultimate Crispiness

Preheat your air fryer to 350 °F (180 °C). Once hot, carefully place the seasoned sweet potato fries in the air fryer basket. Ensure not to overcrowd the basket; arrange them in a single layer to allow the hot air to circulate freely. If you have a larger batch, cook them in smaller portions. Air fry for 15 minutes, shaking the basket vigorously every five minutes. This shaking motion is crucial for ensuring all sides of the fries cook evenly and develop that perfect, golden-brown crispiness. Continue cooking until they reach your desired level of crispness and are tender on the inside.
Step 4: Craft the Irresistible Chili BBQ Dipping Sauce

- In a small bowl, combine the mayonnaise and your favorite BBQ sauce.
- Pour in the sweet chili sauce.
- Mix all ingredients thoroughly until you have a smooth, well-combined sauce. Serve this delicious, tangy, and slightly spicy sauce immediately with your hot, crispy sweet potato fries for an unforgettable pairing!
Tips for Achieving Perfectly Crispy Air Fryer Sweet Potato Fries
While the recipe itself is straightforward, a few key techniques can elevate your sweet potato fries from good to absolutely amazing:
- Slice Uniformly: As mentioned, consistency is critical. Unevenly cut fries will cook unevenly, resulting in some being burnt while others remain soft.
- Pat Dry Thoroughly: Moisture is the enemy of crispiness. Before seasoning, use paper towels to remove as much surface moisture from the sweet potato sticks as possible.
- Don’t Overcrowd the Basket: This is perhaps the most important tip for air frying anything, especially fries. Overcrowding prevents proper air circulation, leading to steaming instead of frying, and ultimately, soggy fries. Cook in batches if necessary, ensuring a single layer.
- Use a Touch of Oil: Even though it’s an air fryer, a very light drizzle of a high smoke point oil (like avocado oil or a neutral vegetable oil) before adding the cornstarch and spices can significantly enhance crispiness and flavor. It helps the coating adhere and crisp up beautifully.
- Shake Frequently: Tossing the basket every 5 minutes ensures all sides of the fries are exposed to the hot air, promoting even browning and crunch.
- Adjust Cook Time for Desired Crispiness: Air fryers vary. Keep an eye on your fries, especially towards the end of the cooking time. You might need an extra minute or two to reach your preferred level of crispness.
The Health Benefits of Sweet Potatoes
Sweet potatoes are not just delicious; they’re also a nutritional powerhouse! Packed with vitamins, minerals, and fiber, they offer a healthier alternative to traditional potato fries. They are an excellent source of beta-carotene, which converts to Vitamin A in your body, supporting vision and immune function. They also provide a good amount of Vitamin C, potassium, and manganese. With their natural sweetness and fiber content, they can help regulate blood sugar levels, making them a smart choice for a satisfying snack or side dish.
Serving Suggestions
These crispy air fryer sweet potato fries are incredibly versatile and pair wonderfully with a variety of meals. Enjoy them as:
- A delicious side dish with grilled chicken, fish, or steak.
- A healthier alternative to regular fries with your favorite burgers or sandwiches.
- A satisfying snack on their own, especially with our homemade Chili BBQ sauce.
- A flavorful addition to wraps or salads for extra texture and taste.
- Perfect for dipping in other sauces like ranch, honey mustard, or a simple sriracha mayo.
💠FAQ: Your Air Fryer Sweet Potato Fries Questions Answered
Despite its name, the sweet potato is actually a tuber, specifically a root vegetable, and not a botanical potato (which belongs to a different plant family). So, it’s firmly a vegetable!
You can achieve crispy sweet potato fries through a couple of effective methods:
1. Cornstarch Coating (as in this recipe): Tossing them with cornstarch before air frying creates a thin, starchy layer that becomes wonderfully crisp.
2. Parboiling with Cornstarch: For an extra layer of crispness, bring a pot of water to a boil and add 3 tablespoons of cornstarch. Add the sweet potato fries and cook for about 5 minutes. Drain thoroughly, then season with garlic powder and chili before air frying for 15 minutes. This method pre-cooks the interior while preparing the surface for maximum crunch.
Absolutely! If you don’t have an air fryer, the oven is a great alternative. For oven baking, add 2 tablespoons of sunflower oil (or other high-heat oil) to the spice mixture with the sweet potatoes. Mix everything thoroughly to ensure an even coating. Spread the potatoes in a single layer on one or two baking trays lined with baking paper, making sure they aren’t crowded. Bake in a preheated oven at 430 °F (220 °C) for about 20 minutes, flipping halfway through, until golden and crispy.
Yes, that’s completely normal and actually a good sign! Sweet potatoes contain natural sugars. When exposed to heat during baking, these sugars caramelize, giving the fries a slightly darker, browner appearance compared to regular potato fries. This caramelization also contributes to their delicious flavor and crisp texture, so don’t worry – it’s part of their charm!
Soft fries can result from a few common issues:
- Uneven Cornstarch Distribution: The cornstarch might not have been properly distributed, leaving some fries without the crispy coating. Ensure you shake them well as instructed.
- Insufficient Shaking/Flipping: Especially in an air fryer, regular shaking is vital for even cooking and crisping.
- Overcrowding: If you baked them in the oven or air fryer in too large a batch, they were likely steaming rather than crisping. Always spread them in a single layer with space between each fry.
- Excess Moisture: Ensure the sweet potatoes are thoroughly patted dry before seasoning.
Absolutely! This recipe uses garlic and chili powder, but feel free to experiment. Smoked paprika, cumin, onion powder, a pinch of cayenne for extra heat, or even a dash of cinnamon and nutmeg for a sweeter fry can all work wonderfully. You can also add dried herbs like rosemary or thyme.
While best served fresh, you can prep the sweet potatoes by cutting them and storing them in an airtight container in the refrigerator for up to 2-3 days. If you’ve already seasoned and coated them, they should be cooked immediately for best results. Cooked fries can be reheated in the air fryer at 350°F (180°C) for 3-5 minutes to regain some crispiness, but they won’t be quite as good as fresh.
More Delicious Potato Recipes
- Cottage cheese loaded baked potatoes
- Hasselback potatoes
- Baked French Fries (Oven Fries)
- Roasted Potatoes with Garlic and Thyme

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📖 Recipe Card
RECIPE CARD

Andréa
Pin Recipe
Equipment
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Air Fryer
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Chef’s knife
Ingredients
Sweet Potato Fries
- 4 medium sweet potatoes
- 4 teaspoons cornstarch
- 1 teaspoon garlic powder
- â…› teaspoon chili powder
- Optional: 1-2 tablespoons olive or avocado oil
- Salt and freshly ground black pepper to taste
Chili BBQ Sauce
- 2 tablespoons mayonnaise
- 2 tablespoons barbecue sauce
- 1 teaspoon sweet chili sauce
All my recipes are written both in Metric (gram / ml) and US Customary (cups / pounds). Here you can select which type of amount you would like to see.
Instructions
Sweet Potato Fries in the Air Fryer
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Peel and wash the sweet potatoes thoroughly. Halve them lengthwise and carefully cut them into long, thin strips of uniform thickness (approximately ¼ to ½ inch) to ensure even cooking. Pat them very dry with a paper towel.
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Place the dried sweet potato sticks in a large bowl (or, for best results, a plastic bag). Add the cornstarch, garlic powder, chili powder, and optional oil, along with a pinch of salt and pepper. Toss or shake vigorously until all fries are evenly covered with a thin, visible layer of the spice mixture.
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Preheat your air fryer to 350 °F (180 °C). Place the seasoned sweet potato fries in the air fryer basket in a single layer, ensuring not to overcrowd. Cook for 15 minutes, shaking the basket well every five minutes to promote even browning and crisping. Continue cooking for a few more minutes if a deeper crisp is desired.
Extra: Sweet Potato Fries in the Oven
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Preheat your oven to 430 °F (220 °C). Line two large baking trays with baking paper for optimal non-stick and crisping results.
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Peel and wash the sweet potatoes thoroughly. Halve them lengthwise and cut them into long, thin strips of consistent thickness, then pat them dry.
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Place the dried sweet potato sticks in a bowl and add two tablespoons of sunflower oil, cornstarch, garlic powder, chili powder, and a pinch of salt and pepper. Mix everything very well until the fries are fully coated.
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Spread the seasoned sweet potato fries onto the prepared baking trays in a single, even layer. Crucially, ensure there is some space between each fry to allow them to crisp up properly without steaming.
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Bake the fries in the preheated oven for 20 minutes, flipping them halfway through, until they are golden brown and crispy to your liking.
Chili BBQ Sauce
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Meanwhile, prepare the delicious dipping sauce: In a small bowl, thoroughly mix the mayonnaise, barbecue sauce, and sweet chili sauce until smooth and well combined.
Serving
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Once cooked, immediately taste the fries and add any additional salt or extra pepper to your preference.
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Serve the hot, crispy sweet potato fries immediately with your freshly made Chili BBQ dipping sauce. Enjoy!
Notes
2. – Shake and Divide – When baking in the air fryer, remember to shake the basket thoroughly every few minutes. This prevents sticking and promotes even crisping. If using an oven, spread the fries evenly on the baking tray; overcrowding will cause them to steam and become soft rather than crispy. Divide into multiple trays if necessary.
3. – Cornstarch – Don’t skip the cornstarch! It is the key ingredient that creates a thin, crispy coating on the sweet potatoes, transforming them from soft to delightfully crunchy.
4. – Good with – These delectable sweet potato fries are an excellent accompaniment to a variety of dishes. They are particularly delicious with crispy chicken nuggets with Parmesan, sweet spare ribs with BBQ sauce, and steak chimichurri.
5. – Storage
Frozen – You can store uncooked, seasoned fries in the freezer for later. Spread them in a single layer on a baking sheet to freeze, then transfer to a freezer-safe bag. To cook, simply place the frozen fries directly into the preheated air fryer and bake for approximately 10 minutes at 350 °F (180 °C), shaking frequently, until heated through and crispy. Cooked fries can be cooled and frozen, then reheated in the air fryer for 5-7 minutes.
6. – Nutritional values Assuming that the sauce and all fries are eaten, the number of calories per person is shown.
Nutrition
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