Crispy Sweet Potato Fries with Spicy Fry Sauce

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Crispy Sweet Potato Fries with Spicy Fry Sauce

It’s The Happy Hour here at The Slow Roasted Italian!  Happy Hump Day!

Here is a fantastic Happy Hour treat to get you through the mid-week blahs!!!

Fries are a favorite in The Slow Roasted Italian household; Oven Baked Garlic Potato Fries, Red Robin Seasoned Oven Baked Fries and now Crispy Sweet Potato Fries.

We also love easy homemade mozzarella sticks that are dangerously delicious!

I found this fabulous write up on Guaranteed Crispy Sweet Potato Fries at The Art of Doing Stuff.   I was skeptical but hopeful as I prepared these fries.  I then discovered La Kocinera and their Sweet Potato Oven Fries with a wonderfully written recipe.  It took me 4 trays before they came out.  But, THEY CAME OUT CRISPY!!!  I must warn you, sweet potato fries are destined to be soft.  After they sit for hours, they do soften up.  But, served straight out of the oven I couldn’t stop eating them.  Even the soft batches, before I perfected my recipe. 

sweet potato fries in a bowl

Crispy Sweet Potato Fries with Spicy Fry Sauce

Donna Elick
Here is a fantastic Happy Hour treat to get you through the mid-week blahs!!!
5 stars from 1 review
Tried this recipe?Please comment and review!
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Course Side Dish
Cuisine American
Method Oven
Servings 2


  • 2 large sweet potatoes
  • 2 tablespoons cornstarch, divided
  • 2 tablespoons olive oil, divided
  • salt and pepper, to taste

Spicy Fry Sauce

  • 1/3 cup mayonnaise
  • 1/2 cup light sour cream
  • 3-4 teaspoons Sriracha sauce, to taste
  • pinch cayenne


  • Preheat the oven to 450 degrees. Line a baking pan with non-stick aluminum foil, or regular aluminum foil coated well with cooking spray. Set aside.
  • Rinse the sweet potatoes, scrubbing the dirt off the skins with a brush. Dry, then peel. Cut each sweet potato in half. Cut each of those pieces in half. Then cut each of those pieces in half.
  • Place half the potatoes in a large plastic bag and add 1 tablespoon cornstarch. Seal the bag and shake it all around to evenly coat the potatoes with cornstarch. Open up the bag and add 1 tablespoon olive oil, then sealing and shaking again until coated.
  • On the baking sheet, evenly space the fries with plenty of room in between each one, so they get crispy instead of steamed and softened. Sprinkle with salt and pepper, to taste. Place in the oven. After 15 minutes, use a pair of tongs to flip each fry and return to the oven for another 5-10 minutes, depending on how dark you like your fries.
  • Prepare the other half of the potatoes in this same way—coating, cooking, flipping, etc.
  • While the final batch of potatoes are in the oven, prepare the Spicy Fry Sauce. Recipe follows.

Spicy Fry Sauce

  • Whisk together the mayonnaise, sour cream, Sriracha sauce and cayenne pepper in a small bowl until well combined. Chill.

Donna’s Notes

This recipe is more geared towards thick-cut, steak fries, with a crisp exterior and soft interior. If you want thin fries that are 100% crisp all the way through, cut each potato as small as you’d like. Just keep an eye on them in the oven, as they may take less time to cook.


Serving: 1 | Calories: 681cal | Carbohydrates: 57g | Protein: 6g | Fat: 48g | Saturated Fat: 10g | Cholesterol: 36mg | Sodium: 569mg | Sugar: 10g | Fiber: 7g | Calcium: 153mg | Iron: 2mg

All nutritional information is based on third party calculations and is only an estimate. Each recipe’s nutritional value will vary depending on the ingredients used, measuring methods, and portion sizes.

Tried this recipe?Let us know how it was!

Originally Published Oct 12, 2011

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  1. I am really liking the spicy fry sauce? yum– what is better than french fries- french fries with the perfect sauce that is

  2. I love, love, love sweet potato fries! Had them for dinner last night, but you are right, they are kinda soft…. I wil definitely try your method. Thanks for posting this recipe! I see more sweet potatoes in my near future!

  3. I love sweet potato and as a frie, yes please!!
    I sent you an email about the bake sale 🙂
    Take care..

  4. I would love this! Sweet potato fries are one of my all-time favorite snack foods. Yours look perfect! I found you through Barefeet in the Kitchen…and so glad I did. I am hosting a Fairy Gobmother giveaway today of a $100 gift certificate for Amazon if you care to stop by.

  5. These look yummy and I like that you use cornstarch…I guess that gives these a nice coating. That spicy sauce sounds great – love to dip and we are huge fans of siracha here:-).

  6. 5 stars
    The spicy-sweet is a perfect combination in this dish. I’ve made these as appetizers and they go so fast.

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