Start by draining and rinsing canned chickpeas, then pat them completely dry. Moisture will prevent them from getting crunchy. I usually lay them out on a paper towel for a few minutes to make sure they’re dry.
Place the chickpeas in a mixing bowl, drizzle with olive oil, and toss with garlic powder, salt, and pepper. Make sure each chickpea is evenly coated. I find tossing them with my hands works best to reach every nook and cranny.
Spread chickpeas on a parchment-lined baking sheet in a single layer. Roast in a preheated oven at 400°F (200°C) for 25-30 minutes, shaking the pan halfway through. They should be golden brown and crispy.
Once roasted, sprinkle grated Parmesan over the hot chickpeas. Toss gently to coat so the cheese melts slightly. This step gives them that irresistible cheesy crunch.
Allow the chickpeas to cool for a few minutes. I always sample a few while they’re warm—it’s hard to resist! They will crisp up even more as they cool.