Preheat your oven to 350°F (175°C). Line a large baking sheet with parchment paper.
Rinse the chickpeas thoroughly until the water runs clear. Drain well.
Spread the chickpeas on a clean kitchen towel and pat them completely dry. Remove any loose skins.
Transfer the chickpeas to a large mixing bowl.
Add the olive oil, sumac, smoked paprika, garlic powder, salt, and black pepper.
Toss until every chickpea is evenly coated with the seasoning.
Spread them into a single layer on the prepared baking sheet.
Bake the Roasted Chickpeas for 45 minutes, shaking the pan after 15 and 30 minutes for even crispiness.
Remove from the oven and allow them to cool for several minutes. They will become even crispier as they cool.
Enjoy immediately or store properly for later.