Sago is a starch extracted from the pith of sago palm stems. A sago wafer is a crisp, skinny, flat cake made of sago flour. The dried sago flour is treated with water to make a paste flattened into thin patties and then dried under the sun or in a dehydrator to make sago wafers. The dried sago wafers or papads are deep-fried in oil and eaten as an accompaniment to a meal or snack. White color sago wafers.