Glutinous Rice Flour (Paeng Khao Niao แป้งข้าวเหนียว)

Unlike its more versatile non-glutinous counterpart, this type of flour is used almost exclusively to make desserts. When a Thai recipe calls for glutinous (or sticky) rice flour, this is the only type of flour you should be using. I cannot think of anything that you can use in its place. This is one of those ingredients that cannot be substituted, in my opinion.