Snacks
This donut fries recipe transforms sweet potatoes into crispy, golden bites that taste like a cross between fries and donuts—no deep fryer required.
The secret lies in air-frying sweet potato sticks until they develop a caramelized crust, then coating them in a spiced sugar mixture that adds just the right amount of sweetness. I first tried this recipe after craving something crispy but wanted a healthier alternative to traditional fries.
The process is simpler than it sounds: slice sweet potatoes into fry-like shapes, air-fry until tender and golden, then toss in a mixture of cinnamon, sugar, and a pinch of salt.
This recipe delivers a satisfying crunch on the outside while keeping the inside soft and sweet. The spiced sugar coating adds a warm, aromatic finish that makes these donut fries irresistible.
What you’ll end up with is a snack that’s perfect for game day, movie nights, or a quick after-school treat. The crispy texture and sweet-spiced flavor make them a crowd-pleaser, and they hold up well for snacking.
Whether you’re serving them as an appetizer or a side, these donut fries are sure to disappear quickly.
For an extra touch, serve them with a side of honey, chocolate sauce, or even a sprinkle of sea salt for contrast. The possibilities are endless, but the method remains foolproof. Let’s get started on making these delicious, crispy bites!
Ingredients for donut fries
Sweet potatoes and a few pantry staples create crispy, caramelized donut fries that taste like dessert and fries combined.
| Ingredient | Amount | Notes |
|---|---|---|
| Sweet Potatoes 🍠 | 2 large | Organic preferred, peeled and sliced |
| Cinnamon 🌿 | 2 tbsp | Ground, high-quality preferred |
| Granulated Sugar 🍚 | ½ cup | White or brown, fine grain |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Olive Oil 🫒 | 1 tbsp | Extra-virgin for best flavor |
| Vanilla Extract 🥛 | ½ tsp | Pure, high-quality preferred |
| Ground Nutmeg 🌿 | ¼ tsp | Freshly grated if possible |
| Honey 🍯 | 1 tbsp | Optional for serving |
| Dark Chocolate Sauce 🍫 | ¼ cup | Optional for serving |
The sweet potatoes are the foundation. Organic varieties from Whole Foods or your local farmers market have the best flavor and texture. Look for firm, vibrant orange potatoes—avoid any with soft spots or bruising. Peeled and sliced into even sticks, they crisp up perfectly in the air fryer. Costco often carries large organic sweet potatoes at a good price, but any grocery store should have them. For extra crispiness, slice them into slightly thinner sticks than typical fries, about 1/4-inch thick.
No cinnamon? Pumpkin pie spice at the same amount works well, though it adds a hint of nutmeg and ginger. Brown sugar can replace white sugar, but it adds moisture, so reduce slightly if your sweet potatoes are extra wet. Short on vanilla? A pinch of vanilla bean paste intensifies the flavor. For a savory twist, swap the sugar coating for smoked paprika and a touch of cayenne—still delicious, just with a different profile. The olive oil is key for crispiness; don’t skip it, even if you’re using an air fryer.
Store leftover sweet potato sticks in an airtight container for up to 3 days, but they’re best fresh. Re-crisp in the air fryer for 2-3 minutes at 375°F if they soften. The spiced sugar coating hardens as it cools, so toss them gently before serving. These hold up well for 2 days in the fridge, making them perfect for meal prep. For a quick snack, keep the sugar mixture in a small jar—it’ll last 2 weeks at room temperature.
Why You'll Love This Recipe
- Sweet Potato Magic: I swear by this trick—just tossing peeled sweet potatoes in a mix of cinnamon, sugar, and salt before frying turns them into something ridiculously better than plain fries. That warm, caramelized crust? It’s like dessert and dinner had a baby.
- One-Pan Wonder: Honestly, this is my lazy-day hero: peel, cut, toss in oil, bake until golden. No deep fryer, no mess, no stress. My oven does all the work while I’m scrolling or watching a show—crispy edges, soft inside, every time.
- Game Day Gold: Between us, these disappear faster than nachos at a tailgate. Sprinkle with extra cinnamon sugar for the crowd, and they’ll think you slaved away for hours. (Spoiler: you didn’t.) Perfect for parties, movie nights, or when you need to feed a hungry horde without breaking a sweat.
- Budget Crunch Fix: Sweet potatoes are my go-to for stretching meals—cheaper than potatoes, sweeter than fries, and way more satisfying. A single bag lasts me weeks for snacks, sides, or even breakfast hash. Plus, the spices cost pennies, so you’re basically printing money in flavor.
Step-by-step instructions for air-crisped sweet potato sticks
Transform simple sweet potatoes into crispy, cinnamon-kissed donut fries with this foolproof air-frying method.
Prepare and Cut the Sweet Potatoes
Begin by peeling the 2 large sweet potatoes using a vegetable peeler or sharp knife. Cut them lengthwise into ¼-inch thick sticks—this ensures even cooking and maximum crispiness. I like to keep the sticks about 3 inches long for easy handling and serving.
Soak the cut sweet potato sticks in a bowl of cold water for 10 minutes to remove excess starch. This step prevents them from sticking together in the air fryer and promotes a crispier texture. Drain thoroughly and pat dry completely with paper towels—any moisture left behind will create steam instead of crispy skin.
Season the Sweet Potato Sticks
In a small bowl, whisk together 2 tablespoons cinnamon, 0.5 cup granulated sugar, 0.5 teaspoon salt, 0.5 teaspoon vanilla extract, and 0.25 teaspoon ground nutmeg. The mixture should look like a fine, aromatic powder. This spiced sugar coating gives the donut fries their signature sweet and warm flavor profile.
Toss the dried sweet potato sticks in the spice mixture until evenly coated. I use a large zip-top bag for this step—it makes tossing easier and ensures every stick gets covered. Shake the bag gently until no white spots remain on the sweet potatoes. Let them sit for 5 minutes while you preheat the air fryer.
Air-Fry Until Golden and Crispy
Preheat the air fryer to 375°F for 3 minutes to ensure even cooking. Arrange the seasoned sweet potato sticks in a single layer in the air fryer basket, leaving space between each piece for proper air circulation. Don't overcrowd the basket—this prevents steam buildup and ensures crispiness.
Air-fry for 12-15 minutes, shaking the basket every 5 minutes for even browning. You'll know they're done when the edges turn golden brown and the sticks feel crispy to the touch. The internal temperature should reach 160°F when tested with a thermometer. Remove them immediately to prevent overcooking—they'll continue to crisp slightly as they cool.
Serve Warm with Optional Toppings
Transfer the crispy sweet potato sticks to a serving platter or individual plates. Drizzle with 1 tablespoon honey for added sweetness, if desired. The honey adds a glossy finish and complements the cinnamon-sugar crust beautifully. For an extra decadent touch, drizzle with 0.25 cup dark chocolate sauce before serving.
Serve immediately while still warm and crispy. These donut fries pair perfectly with vanilla ice cream or a scoop of whipped cream for dipping. The combination of warm, spiced sweet potatoes with cool, creamy toppings creates a delightful contrast in both texture and temperature.
Pro Tips For Making Donut Fries
- CUT SLICES THICKER THAN YOU THINK: I used to slice sweet potatoes paper-thin for these, thinking they’d crisp faster—wrong. Aim for ½-inch thick rounds, or they’ll burn on the outside before softening inside. (Yes, it takes a few extra minutes, but trust me, the texture’s worth it.)
- DON’T SKIP THE WARM-UP DRY: Sweet potatoes release moisture like a sweaty gym sock. Pat them thoroughly with a towel after slicing, then let them sit in a single layer for 10 minutes on a rack. This guarantees crispy fries instead of soggy donut holes.
- FROST THEM FIRST: Here’s the move that saves your sanity: After tossing the sliced potatoes in cinnamon and sugar, freeze them uncovered for 30 minutes. The sugar clings better, and they crisp up faster in the oil—no more waiting for a second round of frying.
- USE A THERMOMETER (OR YOUR EYEBALLS): The oil should be 350°F (175°C)—hot enough to sizzle but not smoke like a campfire. If you don’t have one, watch for tiny bubbles breaking the surface around each fry. Pull them when the edges are golden, not brown, or they’ll turn to ash. (I learned this after a very smoky kitchen.)
Regional styles of this dish
Southern Comfort Style
In the South, donut fries take on a deeper, spicier profile inspired by classic Southern desserts. Swap the cinnamon-sugar coating for a mix of 1 tbsp brown sugar, 1 tsp smoked paprika, ½ tsp cayenne pepper, and ½ tsp ground cloves.
Air-fry the sweet potato sticks as directed, then finish with a drizzle of honey butter (melt 2 tbsp butter with 1 tbsp honey and ¼ tsp cinnamon). This version has a smoky, slightly fiery kick that’s perfect for tailgates or potlucks. 🌶️
Pacific Northwest Twist
Up in Washington or Oregon, you’ll find a more natural, less sweet approach. Toss the air-fried sweet potato sticks in 1 tbsp maple syrup, ½ tsp sea salt, and ½ tsp vanilla bean paste instead of sugar.
For extra crunch, sprinkle with toasted pecans or crumbled walnuts before serving. Pair with a side of blackberry compote for a sophisticated snack that highlights local flavors. The maple adds a caramelized depth without overpowering the sweet potato’s natural sweetness. 🍁
Midwest Classic
The Midwest loves its donuts, so this version leans into a classic glaze that mimics old-school donut shop flavors. After air-frying, dip the sticks in a mix of ½ cup powdered sugar, 2 tbsp milk, and ½ tsp vanilla extract for a light, dusty coating.
For a fun twist, add sprinkles or crushed Oreos on top. This style is all about nostalgia—think state fairs and diner counters. Serve with vanilla ice cream for dipping, just like a giant donut. 🍩
Tex-Mex Fusion
For a bold, savory-sweet mashup, coat your air-fried sweet potato sticks in a blend of 1 tbsp chili powder, 1 tsp cumin, ½ tsp garlic powder, and ½ tsp smoked salt.
After frying, drizzle with a lime crema (mix ¼ cup sour cream, 1 tbsp lime juice, and ½ tsp honey). Top with crumbled cotija cheese and chopped cilantro for a snack that’s both sweet and tangy.
This version is a hit at Tex-Mex parties and brings a fiesta vibe to your table. 🌮
New England Maple Glazed
In New England, maple syrup is king, so this version skips the sugar coating entirely. After air-frying, brush the warm sweet potato sticks with 2 tbsp maple syrup, then sprinkle with flaky sea salt and crushed walnuts.
The syrup caramelizes slightly, creating a sticky, glossy finish. Serve with a side of apple cider for dipping—it’s like a cross between donut holes and caramel apples. This rustic, cozy style is perfect for fall gatherings. 🍁
Asian-Inspired Sesame
For an unexpected but delicious twist, toss the air-fried sweet potato sticks in 1 tbsp toasted sesame oil, 1 tbsp soy sauce, 1 tsp honey, and ½ tsp grated ginger. Finish with white sesame seeds and a sprinkle of red pepper flakes for heat.
This fusion version balances sweet, salty, and umami flavors. Serve with a side of plum sauce or wasabi mayo for dipping. It’s a crowd-pleaser that feels both familiar and exciting. 🌶️
Nutrition facts
Frequently asked questions
Can I make these without an air fryer?
Yes! For a crispy result, use an oven at 425°F instead. Arrange the seasoned sweet potato sticks on a parchment-lined baking sheet in a single layer. Bake for 20-25 minutes, flipping halfway, until golden and crispy. A deep fryer works too—fry at 350°F for 2-3 minutes until golden brown.
What’s the best way to store leftover donut fries?
Keep them in an airtight container at room temperature for 2 days or refrigerate for up to 4 days. To revive crispiness, reheat in the air fryer at 375°F for 3-4 minutes or oven at 400°F for 5 minutes. Avoid microwaving—they’ll turn soggy.
Can I use regular potatoes instead of sweet potatoes?
While possible, sweet potatoes are ideal—their natural sweetness and moisture balance perfectly with the spiced sugar coating. Regular potatoes will be less sweet and may dry out faster. If you must use them, soak longer (15 minutes) and reduce sugar in the coating by 1 tablespoon.
Why did my donut fries turn out soggy?
Overcrowding the air fryer or oven creates steam instead of crispiness. Always leave space between sticks and avoid stacking. Also, ensure sweet potatoes are fully dried after soaking—any moisture left behind prevents proper browning. For extra crispiness, pat them dry with a clean kitchen towel.
What’s the best dipping sauce for these?
Try these crowd-pleasers: chocolate sauce (melt ½ cup chocolate chips + 1 tbsp coconut milk), honey butter (mix 2 tbsp butter + 1 tbsp honey), or spicy mayo (mayo + ½ tsp sriracha). For a lighter option, warm maple syrup with a pinch of salt.