Heat the Oven: Begin by preheating the oven to 425°F. Let it fully heat so the fries crisp properly. Line a large baking sheet with parchment paper to prevent sticking.
Prepare the Fries: Spread the frozen fries in a single layer on the baking sheet. Drizzle vegetable oil evenly over the top. Toss gently with clean hands so each fry gets lightly coated. This step helps the fries brown evenly.
Bake Until Crisp: Place the tray in the oven and bake until golden and crisp. Flip the fries halfway through so both sides cook evenly. Watch closely near the end to keep them crisp without burning.
Mix the Cajun Seasoning: While the fries bake, add paprika, garlic powder, onion powder, cayenne, black pepper, salt, oregano, and thyme to a small bowl. Stir until the color looks even throughout.
Season the Fries: Remove the hot fries from the oven. Sprinkle the Cajun seasoning evenly over the fries right away. Toss gently so every fry gets coated while the heat helps the spices stick.
Serve Hot: Transfer the fries to a serving bowl and enjoy right away while they stay crisp and fragrant.
