Crispy-ish Sweet Potato Fries

Lower-calorie baked sweet potato fries.

4 servings

Time: 45 mins

By Ethan Chlebowski

Normally it’s hard to get crispy sweet potato fries without frying them. This recipe allows you to achieve great texture in the oven. For full science explanation on crisping sweet potatoes, check out the original video explanation.

Ethan Chlebowski

Ethan Chlebowski



  • Fry components

    • sweet potatoes
    • vinegar
      20 g
    • cooking oil
      15 g
    • water
      , cold
      80 g
    • cornstarch
      50 g
    • salt
      to taste
    • black pepper
      to taste


Step 1: Prepare the potatoes & boil

Set a pot of water to over medium-high heat. Preheat your oven to 475° F/246° C.

Meanwhile, peel the sweet potatoes and cut them into approximately 1/3 inch slices, then into roughly 1/3 inch thick fries.

When the water boils, stir in the vinegar and a sizeable pinch of salt until the salt dissolves. Add the sweet potato fries to the boiling water and boil them for 6 minutes.

Afterward, drain the fries using a colander. Gently scratch the surface of the fries with a fork to allow the upcoming slurry mixture to penetrate the crevices.

  • Note: The vinegar slows the breakdown of the pectin, making the fries more durable. It does not significantly influence the flavor.

Step 2: Combine the cornstarch and cold water

Combine the cornstarch and cold water in a bowl. Stir until it's fully mixed with no lumps. Add the hot, drained fries to the bowl and toss until the fries are coated with the thickened slurry. If needed, add more cornstarch to ensure a light coating.

Step 3: Finish prepping the fries & roast

Use tongs to transfer the fries to a wire rack placed over a large baking sheet. Ensure the fries are evenly spaced and not touching.

Drizzle the cooking oil over the fries using a squirt bottle or spoon, aiming for an even coating on each one.

  • You can also use baking spray here.

Once prepared, add the sweet potatoes to the preheated oven and set a timer for 15 minutes to .

Step 4: Flip the fries

Remove the baking sheet from the oven and flip the fries using a spatula. You should notice some blistering on the surface, but the fries should not be overly crisp.

  • If they appear dry, add more oil. Return them to the oven and continue for an additional 10 to 15 minutes.

By now, the fries should be slightly and crispy. However, this could take longer depending on the size of the fries, the amount on the pan, or the type of oil used. If they are not crispy enough, continue baking for a longer duration!

Step 5: Season the fries

Pour the fries into a bowl. Immediately add a pinch of salt and a few cranks of black pepper. Toss the fries in the seasoning and enjoy with your choice of dipping sauce.

  • Note: Feel free to add spices, fresh herbs, cheeses, or any other flavorings of your choice at this stage.


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