Truffle Oil Sweet Potato Fries

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Enjoy these truffle oil sweet potato fries as an easy-to-make gourmet side dish or a snack. Hand-cut sweet potato fries are tossed in olive oil, sprinkled with salt, baked in the oven until crispy at the edges, and then, finished with truffle-infused oil.

Browned sweet potatoes orange fries on a dark-grey background.

Transform your sweet potato fries into something special by adding some truffle-infused oil.

Sweet potatoes are loaded with nutrients, such as dietary fiber, Vitamin A, Potassium and more. They are available all year around and can be found at any grocery store.

There are so many different ways to prepare and enjoy this nutritious vegetable.

Related recipe: oven roasted sweet potato slices.

And if you have an air fryer, use it t bake a whole sweet potato or you can steam it in your instant pot . So much faster than using the oven or the stove.

When we were stationed in Germany, it was the first and only time I tried real truffles. It was a pasta dish with real black truffles. Almost 7 years and I still cannot forget that deep and earthy taste of real truffles. It was the best thing I have ever tried.

Truffle mushrooms are rare, expensive, and can be hard to find. I have not happened to have any since being in Europe.

Truffle oil is more affordable and easy to find. It cannot be compared to real truffles but can be a great alternative way to introduce the truffle flavor if you never tried it before.

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🍄Ingredients and substitutions
🔪Instructions
⏲️How to make truffle oil sweet potato fries with frozen fries
♨️Top tips
🍽How to serve
🌡️How to store
💭Common questions
📖 Recipe
💬 Comments

🍄Ingredients and substitutions

Please, see the recipe card for the ingredients quantities.

Sweet potatoes – you will need two medium sweet potatoes. You can use Beauregard, Jewel, or Garnet. Hannah sweet potatoes (they are white inside), are also good for making fries.
Salt and spices – I used kosher salt, dried thyme and garlic powder. Truffle fries do not need many herbs and spices. Other herbs and spices that go well with truffle flavor: are rosemary, parsley, and basil. You an also add fresh chopped parsley for serving as well.
Olive oil – is used for baking the fries. You can also use avocado oil instead.
Truffle oil – a little bit of truffle oil for drizzling cooked fries to create a deep earthy flavor. A lot of grocery stores carry truffle oil and you can also order it online. You can also use truffle dry seasoning instead.
Grated Parmesan (optional) – prated Parmesan matches Truffles and it is great on fries. Add a little bit or a lot on top of the cooked fries.

Labeled recipe ingredients on a white background. Truffle oil, garlic powder, dried thyme, grated Parmesan, salt, olive oil, two sweet potatoes.

🔪Instructions

Peel and cut potatoes – use a veggie peeler or a knife to peel the potatoes. Cut off the potato ends. You can keep the skin on if it’s your preference.

Cut the potatoes in half lengthwise as shown below. Slice each piece in half and then slice each half again. Cut each slice into ¼ – ½ inch sticks.

Collage of 4 images. Two whole peeled sweet potatoes are on a cutting board. Sweet potatoes are cut in half and then sliced and cut into sticks.

Soak – place cut fries in a bowl with cold water and let them soak for at least 30 minutes and up to 2 hours. If soaking longer, place them in the fridge. Soaking will remove extra starches to make the fries crispy.

Dry – place the fry on a paper towel and pat them dry well.

Season – in a large dry bowl, add soaked and dried sweet potatoes, olive oil, salt, garlic powder and thyme. Mix until each fry is coated with oil.

Raw potato fries soaking in a glass bowl filled with water. Sweet potato fries are drying on a paper towel. A bowl with cut fries seasoned with herbs, salt, and oil. Uncooked fries are arranged on a baking sheet lined with parchment paper.

Bake – Preheat oven to 425°F. Line a baking pan with parchment paper. Arrange seasoned fries in a single layer on parchment paper. Bake the fries for 12 minutes on one side. Flip them using a fork and bake for another 12 minutes or until browned and crispy at the edges.

Note: Bake them in two batches if needed. For the best results, make sure the fries have some space and are not touching.

Cooked orange fries arranged on parchment paper without touching.

Drizzle with truffle oil – drizzle a little bit of truffle oil all over the hot fries. Sprinkle with freshly grated Parmesan cheese, and some flaky salt for serving.

Oil drizzled over the white bowl with cooked sweet potato fries.

⏲️How to make truffle oil sweet potato fries with frozen fries

If you have only frozen sweet potato fries, you can also transform them into a fancy, restaurant-style side dish.

Follow the package instruction to cook the frozen fries until desired crispiness.
Drizzle hot fries with some truffle oil to elevate the dish.
Add grated Parmesan and extra salt for serving.

♨️Top tips

let the cut fries soak in cold water for at least 30 minutes
bake them on the top oven rack to be crispier.
always use parchment paper to bake fries.
drizzle with only a tiny bit of truffle oil first and add more after tasting if needed as it can have a very strong flavor.

🍽How to serve

truffle sweet potato fries are great on their own or with your favorite dip. Garlic aioli is my favorite one.
they are great as a side dish to serve alongside burgers, baked chicken wings, sandwiches, and more. For a healthier meal try the fries with our lemon pepper chicken drumsticks, turkey meatloaf with zucchini or thinly sliced baked chicken breast.

Close-up view of cooked sweet potatoes sprinkled with grated parmesan and salt.

🌡️How to store

If you happen to have any leftovers (which I doubt), store them in an air-tight container for up to 3 days. The best way to reheat homemade fries is in the air fryer. But you can also reheat them in the oven.

Otherwise, homemade fries are the best to be enjoyed right away.

💭Common questions

What is the difference between white truffle oil and black truffle oil?

The black truffle-infused oil has a more complex and earthy flavor. Both kinds can be used to make the recipe.

Can I add truffle oil before baking the fries?

Check the oil bottle description, but most recommend using it only for drizzling and finishing as the oil has a low-medium heat smoke point.

Is the truffle flavor in the oil derived from real truffles?

The cheap oils will more likely contain only artificial flavor. Even the most expensive ones usually contain both real and artificial truffle flavors. Only a few brands claim to have only real truffle flavor. Chose a more expensive bottle, as it will go a long way and will taste the closest to real mushrooms.

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