1. Preheat oven to 450°.
2. Scrub potatoes; cut each into 8 wedges. Place wedges in a large bowl. Drizzle with oil; toss well. Sprinkle with salt, garlic powder, and pepper; toss until potatoes are evenly coated with spices. Arrange wedges in a single layer on a large rimmed baking sheet coated with cooking spray.
3. Bake at 450° for 20 minutes or until browned.