Place the chickpeas in a large food processor (note: the chickpeas will have expanded during the soak time, be sure to use ALL of them here) with onion, garlic, lemon zest, cumin, coriander, salt, cayenne, baking powder, cilantro, parsley, and olive oil. Pulse until well combined but not pureed. Use a spatula to scrape down the sides of the bowl as needed.