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.
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.
Related recipe: oven roasted sweet potato slices.
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.
🍄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.
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.
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.
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.
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.
⏲️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.
- 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.
🌡️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.
The black truffle-infused oil has a more complex and earthy flavor. Both kinds can be used to make the recipe.
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.
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.
Truffle Oil Sweet Potato Fries
- 1 cutting board
- 1 medium bowl
- 1 baking pan and parchment paper
- 2 medium sweet potatoes
- ½ teaspoon salt
- ½ teaspoon dried thyme
- ¼ teaspoon garlic powder
- 2 Tablespoons olive oil
- 1 teaspoon truffle oil or more by taste
- 2 Tablespoons grated Parmesan cheese
- Wash and peel sweet potatoes. Cut each potato in half lengthwise and then into ¼-1/2 inch thick fries.
- Soak the fries in cold water for at least 30 minutes. Dry well using some cloth or paper towels.
- Start preheating the oven to 425°F. Line the baking pan with a sheet of parchment paper.
- In a medium bowl, add fries, 2 tablespoon olive oil, ½ teaspoon salt, ½ teaspoon dried thyme and ¼ teaspoon garlic powder. Mix to coat the fries.
- Arrange the fries on parchment paper in a single layer without them touching each other or overlapping. Bake for 12 minutes. Flip the fries carefully using the fork and bake for another 12 minutes or until the fries are browned and the edges are crispy.
- While the fries are still hot, drizzle them with a teaspoon of truffle oil. Sprinkle with grated Parmesan and extra salt if needed. Enjoy!
- soaking the fries in cold water will make them crispier
- always bake fries on a parchment paper.
- do not add much truffle oil as it has a strong flavor.
- it' s the best enjoy them right away, but the leftovers can be stored for up to 3 days in the fridge.