1

Prep & Peel Preheat oven to 425 °F (220 °C) on convection if available. Scrub 2½ lb sweet potatoes; peel if desired—I leave a few strips for rustic appeal. Slice into ¼-inch planks, then ¼-inch matchsticks. Uniformity is crucial; a mandoline speeds this up.

2

Soak & Chill Submerge fries in a bowl of ice water 30 minutes. This pulls out surface starch and prevents premature browning. Meanwhile, line two rimmed baking sheets with parchment; do not use silicone mats—they trap steam.

3

Dry Thoroughly Drain and spin in a salad spinner, then roll in a lint-free kitchen towel until bone-dry. Any residual water will steam the fries and sabotage crunch.

4

Cornstarch Slurry In a large bowl whisk 2 Tbsp cornstarch with 3 Tbsp cold water until milky. Add 2 Tbsp avocado oil, 1 tsp smoked paprika, 1 tsp sea salt, and ¼ tsp black pepper. The slurry should coat a spoon; add 1 tsp water if paste-like.

5

6
Bake & Flip Slide sheets onto upper-middle and lower racks. Bake 15 minutes. Remove, flip each fry with tongs, rotate pans, bake 10–12 minutes more until edges brown and centers stay vibrant orange.

7
Final Blast Switch oven to high broil 1–2 minutes—watch like a hawk—until blistered spots appear. This mimics deep-fry crunch without the oil bath.

8
Season & Rest Immediately dust with flaky salt; steam will adhere crystals. Let sit 3 minutes on the pan—carry-over heat finishes centers while surfaces stay crisp.

9
Maple Aioli While fries soak, blend ½ cup good mayo, 1 Tbsp maple syrup, 1 tsp Dijon, 1 small grated garlic clove, 1 Tbsp fresh lemon juice, pinch salt. Chill; flavors meld into velvet.

10
Serve & Celebrate Pile fries high, drizzle with extra maple aioli, scatter chopped parsley, and serve the remaining dip in a ramekin for shameless double-dunking. Eat immediately—crunch waits for no one.

Expert Tips

Use Convection

The fan circulates hot air, shaving 5 minutes off cook time and boosting crunch by 30 %. If your oven lacks convection, rotate pans twice and add 2 minutes under broil.

Oil Sparingly

Too much oil acts like a steam blanket. Measure 2 Tbsp per sheet; a spray bottle ensures even mist without puddles.

Sharp Knife, Safe Cut

A dull blade risks slipping on sweet-potate skin. Slice a thin base so the potato sits flat; then cut planks, then sticks—no wobble, no blood.

Don’t Skip the Soak

Even 15 minutes helps, but 30 is the sweet spot. In a rush? Use hot tap water for 10 minutes, then ice to chill before drying.

Flip Once

Multiple flips can break the fragile crust. Wait until bottoms are golden, then turn once with tongs—confidence equals intact fries.

Keep Warm Trick

Hosting? Hold finished fries on a wire rack set over a sheet in a 200 °F oven up to 30 minutes; the low heat desiccates, keeping crunch alive.

Variations to Try

Spicy Cajun: Swap paprika for 1 tsp Cajun seasoning and ¼ tsp cayenne. Serve with chipotle-lime aioli.

Parmesan-Herb: Toss hot fries with ¼ cup grated Parm, 1 tsp garlic powder, and chopped rosemary.

Thai Peanut Dip: Replace aioli with ½ cup peanut butter, 2 Tbsp lime juice, 1 Tbsp soy sauce, and a drizzle of honey.

Loaded Fry Nachos: Pile fries on an oven-safe platter, top with black beans, cheddar, and jalapeños; bake 5 minutes until melty.

Sweet Breakfast Version: Omit paprika, dust finished fries with cinnamon-sugar and serve alongside maple-coconut yogurt.

Air-Fryer Shortcut: Cook in a single layer at 380 °F for 12 minutes, shaking once. Batch small for best airflow.

Storage Tips

Refrigerator: Sweet-potato fries lose crisp once chilled. If you must, store cooled fries in an open paper-towel-lined container up to 3 days. Reheat on a wire rack at 450 °F for 6 minutes; microwave is a no-go.

Freezer: Par-bake 10 minutes, cool, flash-freeze on a sheet, then bag. Final-bake from frozen 18 minutes at 425 °F for near-fresh crunch.

Aioli: Keep refrigerated in a sealed jar up to 1 week. Stir before serving; separation is natural.

Make-Ahead: Soak, dry, and coat fries up to 24 hours ahead; store raw, covered in the fridge. Bake just before guests arrive for hot, crispy glory.

Frequently Asked Questions

Nine times out of ten, excess moisture or overcrowding is the culprit. Dry thoroughly, use cornstarch, and give each fry breathing room. A convection fan is game-changing.

Absolutely. Russets will be even crispier; Yukon Golds turn out creamy inside. Method stays identical, but cut ⅓-inch thick—regular potatoes shrink less.

Not cloying—1 Tbsp across the whole batch offers gentle sweetness balanced by lemon and garlic. Dial syrup down to 2 tsp if you prefer savory.

Yes—cornstarch is naturally gluten-free. Just verify your smoked paprika and mayo are certified GF (most are).

These fries are substantial enough to star as the main, but they also love a companion: black-bean burgers, grilled chicken, or a simple arugula salad with avocado.

Air-fryer yields slightly faster, ultra-crisp fries but demands small batches. Oven is hands-off and feeds a crowd. For two people, air-fryer wins; for four or more, oven reigns.

main-dishes

Pin Recipe

Crispy Baked Sweet Potato Fries with Maple Aioli Dip

(4.9 from 127 reviews)

Prep

15 min

Cook

30 min

Servings

4

Ingredients

2½ lb sweet potatoes (jewel or garnet)

2 Tbsp cornstarch

3 Tbsp cold water

2 Tbsp avocado oil (divided)

1 tsp smoked paprika

1 tsp sea salt + extra flaky for finish

¼ tsp black pepper

½ cup mayonnaise

1 Tbsp pure maple syrup

1 tsp Dijon mustard

1 small garlic clove, grated

1 Tbsp fresh lemon juice

Optional: chopped parsley for garnish

Instructions

Preheat & Prep: Heat oven to 425 °F convection. Peel (optional) and cut sweet potatoes into ¼-inch fries.

Soak: Submerge in ice water 30 minutes; drain and dry completely.

Coat: Whisk cornstarch with cold water, 2 tsp oil, paprika, salt, and pepper. Toss fries until glossy.

Arrange: Divide onto two parchment-lined sheets, spacing evenly. Drizzle remaining oil.

Bake: 15 minutes, flip, rotate pans, bake 10–12 more until browned.

Broil: Broil 1–2 minutes for extra crunch; season with flaky salt.

Aioli: Whisk mayo, maple, Dijon, garlic, lemon, pinch salt. Chill.

Serve: Plate fries, dollop aioli, sprinkle parsley, devour immediately.

Recipe Notes

For ultra-crunch, swap 1 Tbsp cornstarch for rice flour. Fries lose crisp after 15 minutes—time your mains accordingly.

Nutrition (per serving)

312
Calories

7g
Protein

45g
Carbs

12g
Fat