Preheat your oven to 450 degrees F. Line two large rimmed baking sheets with high-heat-resistant parchment paper.*
Spread the carrot slices on paper towels to remove excess water. Transfer them to a large bowl and toss with olive oil, salt, pepper, and garlic powder.
Spread the carrot slices in one layer on the prepared baking sheets. Bake until browned and crispy, about 20 minutes.
If the carrots are not evenly sliced and some slices are still not crispy, remove the crispy ones to a plate and continue baking for about 5 more minutes to crisp up the thicker slices. Watch them closely to make sure they don’t burn.
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Notes
*Some brands of parchment paper don't withstand high oven temperatures. To be on the safe side, you can use nonstick foil rather than parchment. Or use parchment marked as safe for high-heat cooking.