These Cajun air fryer sweet potato fries are made from fresh sweet potatoes and air-fried until browned and crisp around the edges. Cornstarch gives the homemade fries a light, crispy coating, while Cajun seasoning and smoked paprika add plenty of smoky, savory flavor.
They cook in about 15 minutes, which is exactly what I want from a side dish. No pot of oil. No baking sheet taking up the entire oven. Just season the fries, throw them in the air fryer, and flip them once halfway through.
You can serve these crispy air fryer sweet potato fries with ketchup or ranch, but I also included an optional Cajun dipping sauce. It takes about two minutes to mix together and is so good with the smoky fries.
Jump to:
- Why You’ll Love These Cajun Sweet Potato Fries
- Crispy Cajun Air Fryer Sweet Potato Fries Ingredients
- How to Make Sweet Potato Fries in the Air Fryer
- How to Make Sweet Potato Fries Crispy in the Air Fryer
- How Long to Cook Sweet Potato Fries in the Air Fryer
- What Temperature Should You Air-Fry Sweet Potato Fries?
- Optional Cajun Dipping Sauce for Sweet Potato Fries
- Top Tip
- Substitutions
- Cajun Air Fryer Sweet Potato Fries Variations
- What to Serve with Cajun Sweet Potato Fries
- Make Ahead
- How to Store and Reheat Sweet Potato Fries in the Air Fryer
- Frequently Asked Questions About Air Fryer Sweet Potato Fries
- Equipment
- Crispy Cajun Air Fryer Sweet Potato Fries
- Food safety
Why You’ll Love These Cajun Sweet Potato Fries
- They’re made from fresh sweet potatoes. These are fresh-cut sweet potato fries, not frozen fries from a bag. You can peel the potatoes or leave the skin on if you want a little extra texture.
- Cornstarch makes them crispier. A light cornstarch coating absorbs some of the moisture on the outside of the potatoes. It helps the fries brown and gives the edges a better texture.
- The seasoning is really good. Cajun seasoning brings the heat and savory flavor, while smoked paprika makes the fries taste even smokier.
- They cook quickly. Once the fries are cut and seasoned, they need about 12 to 16 minutes in the air fryer.
- The dipping sauce is optional but worth it. It’s creamy, limey, a little spicy, and made with only four ingredients. Obviously, you can still use ranch.
Crispy Cajun Air Fryer Sweet Potato Fries Ingredients
You’ll only need a few simple ingredients to make this recipe. The exact measurements are listed in the recipe card below. Here’s an overview of what you’ll need:
Sweet potatoes: Use fresh, firm sweet potatoes without any soft spots. Try to choose potatoes that are relatively straight because they are much easier to cut into even fries.
Cornstarch: This creates a thin coating on the outside of the potatoes and helps make the sweet potato fries crispy in the air fryer. You only need a light coating. Too much cornstarch can leave white or powdery spots.
Avocado or olive oil spray: Oil helps the fries brown and gives the seasonings something to stick to. I like avocado oil spray because it has a neutral flavor and works well at higher temperatures.
Cajun seasoning: This is where most of the flavor comes from. Cajun seasoning blends vary in salt and spice, so taste yours before adding extra salt.
Smoked paprika: This adds a deeper smoky flavor without making the fries dramatically spicier.
Flaky sea salt: Add this after air-frying so it stays on the surface and gives the fries a little extra crunch.
Freeze-dried chives: These add color and a mild onion flavor. I sprinkle them on after the fries come out of the air fryer.
Optional Cajun dipping sauce: You’ll need mayonnaise, lime juice, Cajun seasoning, and hot sauce if you want it spicy.
See recipe card for quantities.
How to Make Sweet Potato Fries in the Air Fryer
Peel the sweet potatoes, if desired, and cut them into ¼-inch-thick sticks. The fries do not need to be geometrically perfect, but keeping them close to the same thickness helps them cook evenly.
If some are very thin and others are thick, the thin ones will burn before the thick ones finish cooking. Nobody wants to babysit individual fries.
Pat the fresh-cut sweet potato fries completely dry with paper towels or a clean kitchen towel.
This step matters. Any water left on the surface will turn to steam in the air fryer, which works directly against the crispy texture we’re trying to create.
Place the dried fries in a large mixing bowl. Sprinkle the cornstarch over the potatoes and toss until every fry has a very thin, even coating.
You should barely be able to see the cornstarch. Break up any white patches before adding the oil.
Spray the fries evenly with avocado or olive oil. Add the Cajun seasoning and smoked paprika, then toss again until everything is evenly distributed.
The fries should be lightly coated with oil, not dripping in it. Add a little more spray if you still see dry cornstarch.
Preheat the air fryer to 380°F if your model recommends preheating.
Arrange the fries in a single layer in the air fryer basket. Leave a little room between them so the hot air can circulate.
Do not pile all the fries on top of each other just to avoid cooking a second batch. Overcrowded sweet potato fries steam instead of crisp. Cook them in batches if necessary.
Air-fry the sweet potato fries at 380°F for 12 to 16 minutes. Flip the fries or shake the basket after about 7 minutes.
Continue cooking until the fries are tender in the center and browned around the edges. The exact time will depend on the thickness of your fries and the strength of your air fryer.
Transfer the hot fries to a serving plate. Immediately season them with flaky sea salt and sprinkle the freeze-dried chives over the top.
Serve right away with ketchup, ranch, or the optional Cajun dipping sauce.
How to Make Sweet Potato Fries Crispy in the Air Fryer
Sweet potatoes contain more moisture and natural sugar than regular potatoes, so homemade sweet potato fries usually will not have exactly the same texture as deep-fried restaurant fries. They can still get nicely browned and crisp around the edges if you follow a few important steps.
Dry the potatoes thoroughly. Moisture on the surface creates steam and makes the fries soft.
Use cornstarch. The cornstarch absorbs some surface moisture and creates a light coating that becomes crisp as the fries cook.
Add enough oil to coat them. A thin, even coating is all you need. Make sure there are no dry, powdery patches of cornstarch.
Cut uniform fries. Aim for sticks about ¼ inch thick so they finish cooking at approximately the same time.
Leave room in the basket. The air fryer only works when hot air can move around the food. Cook in batches instead of crowding the fries.
Serve them immediately. Sweet potato fries naturally soften as they cool, so this is not the recipe to leave sitting on the counter for 30 minutes.
How Long to Cook Sweet Potato Fries in the Air Fryer
Fresh ¼-inch sweet potato fries generally take 12 to 16 minutes at 380°F in the air fryer.
Flip the fries or shake the basket after approximately 7 minutes. Begin checking them at the 12-minute mark. Continue air-frying until the centers are tender and the edges are browned.
Air fryers vary quite a bit. A large basket, a compact basket, and an air-fryer oven may all cook these fries at slightly different speeds. Use the cooking time as a range and rely on the color and texture of the fries to decide when they are done.
What Temperature Should You Air-Fry Sweet Potato Fries?
I air-fry these sweet potato fries at 380°F. This temperature is hot enough to brown the cornstarch coating without burning the Cajun seasoning before the centers of the fries become tender.
If your air fryer runs cool, the fries may need a few additional minutes. If it runs hot, check them early.
Optional Cajun Dipping Sauce for Sweet Potato Fries
This easy dipping sauce for sweet potato fries is creamy, tangy, and slightly spicy. It works especially well with the smoked paprika and Cajun seasoning in the fries.
Cajun Dipping Sauce Ingredients
- ¼ cup mayonnaise
- 1 tablespoon fresh lime juice
- ½ teaspoon Cajun seasoning
- Dash of hot sauce, optional
Instructions
Add the mayonnaise, lime juice, and Cajun seasoning to a small bowl. Whisk until smooth.
Taste and add a dash of hot sauce if you want more heat. You can also add another squeeze of lime if you prefer a thinner, tangier sauce.
Cover and refrigerate the sauce until you’re ready to serve. It can be made up to three days in advance.
Top Tip
Do not add the cornstarch to wet potatoes. Pat the fries completely dry first, then toss them with a thin layer of cornstarch before adding the oil.
If the cornstarch immediately becomes gummy or clumpy, the potatoes were still too wet. Dry fries plus a light coating of cornstarch equals much better browning.
Substitutions
Cornstarch: Arrowroot starch can work as a substitute, although the finished coating may be slightly less crisp. Use the same amount.
Avocado oil spray: Olive oil spray works well too. You can also toss the potatoes with about one tablespoon of oil if you do not have cooking spray.
Cajun seasoning: Creole seasoning is the closest substitute. Check the salt level because some blends are much saltier than others.
Smoked paprika: Regular paprika works, but you will lose some of the smoky flavor. Chipotle powder is another option, although it will make the fries substantially spicier.
Mayonnaise: Plain Greek yogurt can replace the mayonnaise in the dipping sauce. The sauce will be lighter and tangier.
Lime juice: Lemon juice works if that is what you have, although I prefer lime with the Cajun seasoning.
Freeze-dried chives: Use finely chopped fresh chives, parsley, or green onions.
Cajun Air Fryer Sweet Potato Fries Variations
Make them spicier: Add ⅛ to ¼ teaspoon of cayenne pepper with the smoked paprika. You can also add extra hot sauce to the Cajun mayo.
Make them smoky-sweet: Add a small pinch of brown sugar or maple sugar to the seasoning. Keep the amount small because sugar can burn quickly in the air fryer.
Add garlic: Mix ½ teaspoon of garlic powder into the seasoning blend.
Make a yogurt dipping sauce: Replace the mayonnaise with plain Greek yogurt and add an extra splash of lime juice.
Change the garnish: Finish the fries with fresh cilantro, sliced green onions, or crumbled Cotija instead of chives.
What to Serve with Cajun Sweet Potato Fries
These fries work as a snack, but they are also such a good side for burgers, sandwiches, and anything spicy.
Serve them with my Hot Honey Fried Chicken Sandwich if you want a full crispy-and-spicy situation. They would also be really good alongside my Bunless Burger or Chicken Caprese Sandwich.
If you want to keep the air fryer going, pair them with Air Fryer Buffalo Drumsticks or Italian Chicken Cutlets. Just cook the fries after the chicken so you can serve them hot and crisp.
If you want to save this one somewhere other than the 400 screenshots in your phone, write it down in my Cilantro Parsley Recipe Card Box Set. This is exactly the kind of easy side dish I make over and over.
Make Ahead
You can cut the sweet potatoes several hours in advance. Store the cut potatoes submerged in cold water in the refrigerator to prevent browning.
Before seasoning them, drain the potatoes and dry them extremely well. They need to be completely dry before you add the cornstarch.
Do not coat the fries with cornstarch, oil, or seasoning until you are ready to cook. The coating can become wet and gummy if it sits for too long.
The optional Cajun dipping sauce can be made up to three days ahead and refrigerated in an airtight container.
How to Store and Reheat Sweet Potato Fries in the Air Fryer
Refrigerator
Allow leftover fries to cool, then store them in an airtight container in the refrigerator for up to three days.
Do not store the Cajun dipping sauce in the same container. Keep it refrigerated separately.
Freezer
You can freeze the cooked fries, but they will not be quite as crisp after reheating. Arrange them on a lined tray and freeze until firm, then transfer them to a freezer-safe container for up to two months.
Reheat them directly from frozen in the air fryer. Do not thaw them first.
Reheating
To reheat sweet potato fries in the air fryer, arrange them in a single layer and cook at 375°F for 3 to 5 minutes. Shake the basket once and serve immediately.
Frozen leftover fries may need 5 to 8 minutes. The microwave technically works, but the fries will be soft. I would use the air fryer again.
Frequently Asked Questions About Air Fryer Sweet Potato Fries
Do I have to peel the sweet potatoes?
No. Peeling is completely optional. If you leave the skin on, scrub the sweet potatoes well and dry them before cutting.
Why aren’t my sweet potato fries crispy?
The most common causes are excess moisture, overcrowding the air fryer, too little oil, or fries that were cut too thick. Pat the potatoes dry, use a light cornstarch coating, and cook them in a single layer.
Why do you use cornstarch on sweet potato fries?
Cornstarch absorbs some moisture from the surface of the potatoes and creates a thin coating that becomes crisp in the air fryer. It also helps the seasoning cling to the fries.
Can I use frozen sweet potato fries?
You can cook frozen sweet potato fries in an air fryer, but the directions will be different from this recipe. This recipe was developed specifically for homemade fries cut from fresh sweet potatoes.
Packaged frozen fries are usually already coated with oil and starch, so follow the temperature and timing on the package.
Are Cajun sweet potato fries spicy?
They can be mildly to moderately spicy depending on the Cajun seasoning you use. Every blend is different. If you are sensitive to heat, start with less seasoning and skip the hot sauce in the dip.
Can I cook all the fries at once?
Only if they fit in a single, fairly loose layer. If the fries overlap heavily, cook them in batches. Giving them room is one of the easiest ways to improve their texture.
Can I make air fryer sweet potato fries without cornstarch?
Yes, but they may not get quite as crisp around the edges. The fries will still taste good, so you can leave it out if necessary.
Equipment
An air fryer is the one piece of equipment that meaningfully affects this recipe. A basket-style air fryer usually gives the fries more direct airflow, while an air-fryer oven may require a little extra cooking time. I use this Gourmia brand, but Cosori is a good one and affordable.
You will also need a sharp chef’s knife to cut even fries. A dedicated fry cutter is useful if you make homemade fries frequently, but it is definitely not required.
Crispy Cajun Air Fryer Sweet Potato Fries
- Total Time: 24 minutes
- Yield: 4 servings 1x
- Diet: Vegetarian
Description
Fresh-cut sweet potatoes are lightly coated with cornstarch, Cajun seasoning, and smoked paprika, then air-fried until tender inside and crisp around the edges. Serve these homemade air fryer sweet potato fries with an optional creamy Cajun dipping sauce.
Ingredients
Cajun Sweet Potato Fries
-
2 medium sweet potatoes
-
1 tablespoon cornstarch
-
Avocado or olive oil spray
-
2 teaspoons Cajun seasoning
-
2 teaspoons smoked paprika
-
Flaky sea salt, to taste
-
2 tablespoons freeze-dried chives
Optional Cajun Dipping Sauce
- ¼ cup mayonnaise
- 1 tablespoon fresh lime juice
- ½ teaspoon Cajun seasoning
- Dash of hot sauce, optional
Instructions
- Preheat the air fryer to 380°F if recommended for your model.
- Peel the sweet potatoes, if desired, and cut them into uniform ¼-inch-thick sticks.
- Pat the sweet potato sticks completely dry with paper towels or a clean kitchen towel.
- Place the fries in a large mixing bowl. Sprinkle the cornstarch over them and toss until they have a very thin, even coating with no large white patches.
- Spray the fries evenly with avocado or olive oil. Add the Cajun seasoning and smoked paprika, then toss until evenly coated.
- Arrange the fries in a single layer in the air fryer basket, leaving space between them. Cook in batches if necessary.
- Air-fry at 380°F for 12 to 16 minutes, flipping the fries or shaking the basket after approximately 7 minutes. Continue cooking until the centers are tender and the edges are browned and crisp.
- While the fries cook, make the optional dipping sauce. Whisk the mayonnaise, lime juice, Cajun seasoning, and hot sauce together in a small bowl until smooth.
- Transfer the fries to a serving plate. Immediately sprinkle them with flaky sea salt and freeze-dried chives. Serve hot with the Cajun dipping sauce, ketchup, or ranch.
Notes
- Cut the fries as evenly as possible so they finish cooking at the same time.
- Dry the potatoes thoroughly before adding the cornstarch.
- Use only a thin layer of cornstarch to avoid a powdery coating.
- Cajun seasoning blends vary in salt and heat. Taste yours before adding extra salt.
- Do not overcrowd the air fryer basket. Cook the fries in batches if necessary.
- Serve immediately because homemade sweet potato fries soften as they cool.
- Cooking time varies by air-fryer model and fry thickness.
- Prep Time: 10 minutes
- Cook Time: 14 minutes
- Category: Sides
- Method: Air Frying
- Cuisine: American
Nutrition
- Serving Size: 1
- Calories: 101kcal
- Sugar: 7g
- Sodium: 651mg
- Fat: 0.2g
- Saturated Fat: 0g
- Carbohydrates: 23g
- Fiber: 4g
- Protein: 2g
- Cholesterol: 0mg
Food safety
- Cook to a minimum temperature of 165 °F (74 °C)
- Do not use the same utensils on cooked food, that previously touched raw meat
- Wash hands after touching raw meat
- Don't leave food sitting out at room temperature for extended periods
- Never leave cooking food unattended
- Use oils with high smoking point to avoid harmful compounds
- Always have good ventilation when using a gas stove
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