In Seattle, pandan leaf – bai toey – is available fresh or frozen at Asian Markets and comes in a package of six leaves. For green food coloring, I recommend that you use all six leaves and freeze any extra juice—the greener the better. I have been making many Thai desserts the last few months and have been using a lot of pandan leaves. For some desserts, the complete flavor profile is very dependent on the pandan flavor. One of these is sungkaya – Thai custard; I have added my favorite pandan custard – Sungkaya Bai Toey – to my Thai Street Food class.