If you want to make traditional Arabic coffee, it is best to use green cardamom. It has a light, fresh flavor that pairs well with coffee. Cardamom is often added to the coffee grounds before brewing to infuse the coffee with its distinctive aroma and taste. You can find whole green cardamom pods at many grocery stores and specialty spice shops, and you can crush the pods and add them to the coffee grounds before brewing. Alternatively, you can purchase pre-ground green cardamom and add a pinch to the coffee before brewing to achieve the same effect.