Start by preheating your oven to 400°F (200°C). Line a baking sheet with parchment paper and set it aside. Wash your potatoes thoroughly and pat them completely dry with a towel—this step helps the oil stick better, ensuring the slices bake up nice and crisp.
Slice the potatoes into ¼-inch rounds. You can keep the skin on for extra texture and nutrients, or peel them if you prefer. Place the slices in a large bowl or zip-top bag. Add olive oil, onion powder, garlic powder, paprika, salt, and pepper. Toss well to make sure every slice is evenly coated in the oil and seasoning mix.
Arrange the seasoned potato slices in a single layer on your prepared baking sheet. Avoid overlapping—this helps them crisp evenly. Bake for about 40–45 minutes, flipping halfway through for even browning. Once they’re golden on the edges and tender in the middle, they’re ready! For an extra crispy finish, you can broil them for 2–3 minutes at the end—just keep a close eye so they don’t burn.