Preheat your oven to 415°F and line a large baking sheet with parchment paper.
Peel and cut the sweet potatoes into even ¼-inch fries. The more uniform they are, the better they’ll cook.
Toss the fries in a large bowl with olive oil, salt, starch, and any optional seasonings until evenly coated. The starch helps create that light, crisp texture on the outside.
Spread them out evenly on the baking sheet in a single layer—avoid overcrowding so they roast instead of steam.
Bake for 30 minutes, flipping halfway through.
Finish under the broiler for a few minutes until the fries reach the level of crispiness you like. Keep a close eye on them during this step so they don’t burn.
Serve warm with burgers, grilled chicken, or your favorite dipping sauce!