01 - Set oven to 400°F (204°C) and arrange rack in center position.
02 - Pat chickpeas thoroughly dry using clean kitchen towels, removing any loose skins.
03 - Combine dried chickpeas, olive oil, ranch seasoning powder, garlic powder, onion powder, salt, and black pepper in a large mixing bowl. Toss until evenly coated.
04 - Spread seasoned chickpeas over a parchment-lined baking sheet in a single layer, ensuring even spacing.
05 - Roast chickpeas in preheated oven for 30-35 minutes, stirring halfway through, until golden brown and crisp.
06 - Allow chickpeas to cool on the baking sheet for 10 minutes to enhance crunchiness before serving.