Why This Recipe Works

Ultra-crispy exteriors: A light toss in cornstarch and olive oil creates a micro-batter that bronzes into a shatteringly crisp shell.
Flavor-layered from the start: Seasoning at every stage—soaking, coating, and finishing—means every bite tastes robust, not just the surface.
Fresh rosemary timing: Adding chopped rosemary halfway through roasting prevents bitter scorching while preserving its piney perfume.
Even cooking: A 15-minute cold soak removes excess starch, ensuring the wedges cook uniformly and stay fluffy inside.
Built-in sauce: The roasted garlic cloves mellow into buttery pockets you can squeeze over the wedges tableside.
Meal-prep friendly: Par-roast and freeze; finish at 425 °F for 10 minutes on a busy weeknight.

Ingredients You'll Need

Sweet potatoes are the star, but a handful of pantry staples elevate them into restaurant-quality fare. Choose medium-sized, firm sweet potatoes with unblemished skin—jewel or garnet varieties strike the perfect balance of sweetness and starch. The cornstarch may feel optional, but it’s the secret weapon for crunch; arrowroot or potato starch work in a pinch. Use a good-quality extra-virgin olive oil with grassy notes; you’ll taste it in the final bite. Fresh rosemary is non-negotiable here—dried won’t bloom under high heat the same way. If your market sells the common “gourmet” bundles, look for softer tips; woody sprigs are harder to mince. Finally, flaky sea salt (I love Maldon) adds a finishing crackle that kosher salt can’t replicate.

How to Make Crispy Sweet Potato Wedges with Rosemary

Prep & Soak

Scrub 2 lb sweet potatoes but leave skin on for texture and nutrients. Slice lengthwise into 8 wedges per potato. Submerge in a bowl of cold water with 1 tsp salt for 15 minutes. This pulls out surface starch and jump-starts crispy edges. Drain and blot bone-dry with a lint-free kitchen towel—excess moisture is the enemy of caramelization.

Preheat & Season

Place a rimmed sheet pan (half-sheet size) on the middle rack and heat oven to 425 °F (220 °C). A screaming-hot pan sears the cut side instantly, preventing sogginess. Meanwhile, toss dried wedges in a bowl with 1 Tbsp cornstarch until lightly coated, then drizzle 3 Tbsp olive oil, ½ tsp kosher salt, ¼ tsp black pepper, and ⅛ tsp smoked paprika for subtle warmth.

Arrange & Roast

Carefully remove the hot pan, lightly brush with another 1 tsp oil, and scatter wedges cut-side down in a single layer—overcrowding steams, so use two pans if necessary. Roast 15 minutes. Resist the urge to flip early; undisturbed contact forms the golden crust.

Add Aromatics

Flip wedges with a thin metal spatula. Scatter 3 cloves unpeeled garlic and 1 Tbsp finely chopped fresh rosemary over the pan. Return to oven 10–12 minutes more, until edges are mahogany and centers yield easily to a fork.

Finish & Serve

Transfer to a warm platter. Squeeze roasted garlic from skins, mash with a pinch of salt, and whisk with 1 Tbsp olive oil and 1 tsp lemon juice for an impromptu sauce. Drizzle over wedges, shower with extra rosemary needles, and finish with flaky sea salt. Serve immediately—crispy glory waits for no one.

Expert Tips

Maximize Crunch

After soaking, let wedges air-dry on a rack for 30 minutes. The drier the edge, the louder the crunch.

Temperature Check

An oven thermometer is cheap insurance; many home ovens run 25 °F cool, sabotaging crispiness.

Cut Uniformly

Aim for ¾-inch at the wedge’s thickest part. Uneven sizes mean some burn while others stay undercooked.

Reuse the Oil

Strain and refrigerate the lightly scented oil for vinaigrettes; it carries whispered rosemary and garlic notes.

Overnight Hack

Soak wedges the night before; store in fresh cold water. Pat dry when ready to roast—dinner comes together in 25 minutes.

Broiler Boost

For extra blister, broil 90 seconds at the end, keeping the door ajar so you can watch the color develop.

Variations to Try

Storage Tips

Cool leftovers completely, then refrigerate in a single layer in an airtight container; they’ll keep 4 days. Reheat on a pre-heated sheet pan at 400 °F for 8 minutes—microwaves turn them limp. For longer storage, par-roast (step 3) 12 minutes, cool, freeze in a single layer on a tray, then transfer to a zip bag for up to 2 months. Finish roasting straight from frozen, adding 3–4 extra minutes. The texture won’t be quite as shatter-crisp as day-one, but they still beat takeout fries.

Frequently Asked Questions

True yams are starchier and drier; they’ll work but need an extra 1 Tbsp oil and 5 minutes cook time.

Nope! The skin adds fiber and crispiness; just scrub well and remove any blemishes.

Yes! Pre-heat air fryer to 400 °F, cook in a single layer 12–14 minutes, shaking halfway.

Either the potatoes weren’t dry, the pan wasn’t hot, or they were overcrowded. All three trap steam.

They lose crunch but still taste great. Reheat in a 425 °F oven for 10 minutes on a wire rack set over a pan.

Try garlicky aioli, smoky paprika ketchup, maple-mustard, or the roasted-garlic lemon drizzle included above.

Crispy Sweet Potato Wedges with Rosemary