This invention provides a dry plant materials, having ability of returning to original states fully while maintaining the original appearance, texture, flavor and hardness, regardless of the size of the materials. The dry plant materials having ability of returning to original states fully while maintaining the original appearance, texture, flavor and hardness, regardless of the size of the materials, was obtained by contacting the raw or heated plant materials with an enzyme treating solution containing an enzyme, and after enzymatic hydrolyzation, under going a freeze-drying process.
