Preheat oven to 400 and line a large rimmed baking sheet with parchment paper.
Pour rinsed beans onto towel/paper towels and place another towel on top and gently rub until completely dry. Transfer to baking sheet.
Drizzle chickpeas with oil and roll them around until evenly coated.
Sprinkle with garlic and onion powder, salt, and cayenne. Roll them around until evenly coated.
Roast for 20 minutes and then shake the pan gently to roll the chickpeas around. Roast for 10-15 minutes more, until golden and lightly charred (be sure to keep an eye on them so they don't burn).