Preheat oven to 425 degrees F. Line two large baking sheets with parchment paper and generously spray with nonstick cooking spray.
Cut potatoes into ¼” inch thick matchsticks.
Arrange fries on the two prepared baking sheets so that none of the fries are touching. This will allow them to crisp up while they bake. Spray the top of the french fries with a little olive oil cooking spray.
If you don't have truffle oil, you can simply use olive oil instead.