Preheat the oven to 425°F (218°C). Wash the parsnips and trim the ends off. Optionally, peel the skins.Slice the parsnips into uniform pieces, about 1/2 inch wide by about 4 inches.
Toss to coat the parsnip fries with olive oil and season with salt, pepper, and garlic powder.
Lay on a parchment-lined baking sheet and roast for 20-22 minutes, turning once halfway through. Watch closely to make sure no pieces are burning as it gets close to the end of the cook time.
Once the parsnips are done cooking, transfer them to a plate. Season with salt and pepper and serve while they're hot.
Notes
Air Fryer Method: Follow steps 1 and 2 above. Preheat the air fryer to 350°F (176°C). Lightly spray the basket with oil, then work in batches and add the parsnip fries to the basket in a single layer. Cook for 15-17 minutes, stopping halfway to shake the basket and flip the fries. Once they're crispy, remove the fries & serve!Store leftovers: Transfer leftovers to an airtight container, cover, and store in the refrigerator for 3-4 days, per USDA.Reheat leftovers: Bake in the oven at 400°F for 7-10 minutes, just until the fries are beginning to crisp up again.