Prain and Burkill, hereinafter referred to by the Thai translation of Man thian, is a wild yam. It is a long cylindrical tuber that has a vine stem. The peel color is yellow or brown and the edible part is white. In the past, Man thian was found in the forest, but it will disappear soon. With this reason, the Rayong Botanical Garden organization needs to protect and promote this plant for utilization as a local plant. The development of Man thian to be a flour and use as a material for food products is a way to store this flour for the consumers throughout the year. This research aimed to: 1) study the optimal conditions to produce Man thian flour, 2) to analyze
the properties of the obtained flour and, 3) apply for food product certification. The experiment was carried out by preparing precipitated flour and drying it at the temperature of 50C for 8, 9 and 10 hours, respectively. The obtained flour was analyzed for chemical and physical properties
and utilized for partial substitution of Arrowroot ( Tacca leontopetaloides (L.) Kuntze) flour in steamed layer cake.
