Why This Recipe Works

Double-soak technique: A 30-minute cold-water bath removes excess starch, guaranteeing crunch without sogginess.
Cornstarch light coat: Just a teaspoon per potato creates a micro-shell that browns like a dream.
High-heat convection: 425 °F with fan circulation dries the surface for maximum crispitude.
Chipotle mayo from scratch: Ready in 90 seconds and keeps five days—meal-prep friendly!
Gluten-free & vegan-option: Swap aquafaba mayo to keep everyone at the table happy.
Freezer-friendly: Par-bake, cool, freeze; reheat at 450 °F for 8 minutes—crisp revived.

Ingredients You'll Need

Sweet potatoes are the star, but not all tubers are created equal. Look for firm, medium-sized garnets or jewels—about 8–10 oz each—skin vibrant and tight, no wrinkling at the ends. Organic isn’t mandatory, but since we’re keeping the skin on for extra fiber and that rustic “fry” aesthetic, give them a good scrub under warm water. Olive oil should be fresh; if yours smells slightly winy, it’s past prime and will turn bitter at high heat. A light, neutral extra-virgin variety works best.

Cornstarch is the secret weapon here; it absorbs residual moisture and forms a gossamer crust. If you’re out, arrowroot or potato starch are fine stand-ins. Smoked paprika amplifies the grill-punch we’d normally get from a fryer, while a whisper of cinnamon bridges the natural sweetness. Kosher salt flakes dissolve quickly and season evenly; table salt works in a pinch—just halve the volume.

For the chipotle mayo, grab a can of chipotle peppers in adobo. Leftover chiles freeze beautifully in ice-cube trays; you’ll thank yourself next taco night. Use good-quality mayo (I like avocado-oil based for its buttery texture), plus a squeeze of lime to brighten all that smoky heat. Maple syrup might sound odd, but a teaspoon rounds the edges and marries beautifully with sweet potato’s flavor profile.

How to Make Crispy Baked Sweet Potato Fries With A Chipotle Mayo

Prep & soak

Scrub 2 lb sweet potatoes and slice lengthwise into ¼-inch planks, then into ¼-inch matchsticks. Submerge in a bowl of ice water 30 minutes. This draws out surface starch and prevents the dreaded limp fry. Drain, then roll in a kitchen towel until bone-dry—any lingering water will steam instead of roast.

Preheat & season

Set oven to 425 °F (220 °C) with rack in lower-middle. Slide in a heavy sheet pan to heat up; a blazing-hot surface sears the bottoms immediately. Meanwhile toss dried fries in 2 Tbsp olive oil, 1 tsp cornstarch, ¾ tsp smoked paprika, ¼ tsp cinnamon, ½ tsp kosher salt, and ¼ tsp freshly cracked pepper until every stick is glossy.

Flip & finish

With a thin spatula, flip each fry, rotate pan 180°, and bake 10–12 minutes more until mahogany edges appear. If your oven runs cool, broil the last 2 minutes—but watch like a hawk; sweet potatoes scorch fast.

Chipotle mayo

In a mini processor blitz ½ cup mayo, 1 minced chipotle pepper, 1 tsp adobo sauce, juice of ½ lime, 1 tsp maple syrup, and a pinch of salt. No processor? Finely mince the pepper and whisk by hand. Taste; add more adobo for heat, more lime for zing.

Serve immediately

Pile fries onto a warm platter, shower with fresh cilantro if desired, and dunk generously into the smoky mayo. Best enjoyed straight from the oven, but see storage tips if you somehow have leftovers.

Expert Tips

Cut uniformly

A mandoline set to ¼ inch guarantees even cooking. If knife-cutting, slice a thin sliver off one side to create a stable base before you start slicing.

No convection? No problem

Rotate pans front-to-back and top-to-bottom halfway through, and add 2–3 extra minutes to total bake time.

Reuse the hot pan

Preheating the sheet pan isn’t negotiable. Cast iron or dark metal sears fastest; avoid glass, which can shatter.

Flavor boost

Add ½ tsp garlic powder or a pinch of ancho chile for deeper complexity without extra heat.

Oil lightly

Too much oil pools and fries will stew. Measure with a spoon; you can always mist more halfway through.

Salt post-flip

A whisper of flaky salt right after flipping sticks to the tacky surface and gives little salty pops.

Variations to Try

Storage Tips

Room temp: Fries lose crunch after 30 minutes. If serving a crowd, keep them on a wire rack in a 200 °F oven up to 1 hour.

Refrigerate: Cool completely, then store in an airtight container up to 4 days. Reheat on a sheet pan at 450 °F for 6–7 minutes; microwave will render them limp.

Freeze: Par-bake 10 minutes, cool, flash-freeze on a tray, then transfer to zip bags up to 3 months. Bake from frozen at 450 °F for 12–14 minutes, flipping halfway.

Chipotle mayo: Refrigerate in a sealed jar up to 5 days. Stir before serving; separation is natural.

Frequently Asked Questions

In most US grocery stores, what’s labeled “yam” is actually a darker-fleshed sweet potato. True yams are starchier and drier; they’ll work but need an extra tablespoon of oil and longer soak.

Sugar content in sweet potatoes caramelizes quickly. Lower oven to 400 °F and extend bake time, or move rack one slot higher away from direct heat.

Preheat air fryer to 380 °F. Cook in a single layer 10 minutes, shake, then 6–8 minutes more. Work in small batches for best airflow.

Start with ½ teaspoon adobo sauce only, taste, and add more gradually. You can also substitute roasted red pepper for a mild smoky dip.

Nope! The skin adds fiber and extra crunch. Just scrub well and trim any blemishes.

Crispy Baked Sweet Potato Fries With A Chipotle Mayo

Why This Recipe Works

Ingredients You'll Need