Phaen kra-yo are thin, dough-like sheets of pastry, made from a liquid mixture of rice flour, water and salt. This substance, known as kra-yo, is daubed onto a piece of linen cloth, which is stretched over a kettle with boiling water.

The whole thing is then covered off by a coin-shaped lid, allowing the dough to become solid without drying out. After this short process, the soft sheets are carefully taken off with a very thin spatula and sun-dried on large, grid-like frames (fig.).