Cassava is generally consumed by Javanese who inhabited the areas where cassava plant is cultivated; therefore, culturally, it has ethnic importance. Even though formerly it was regarded as marginal food, its existence follows the nature of culture—ever-changing based on space and time. The study done aims to disclose the genealogy of various kinds of cassava-based foods in connection with Javanese food choices and food ways. Accordingly, the discussion encompasses the materials used, the preparation methods; cooking, serving, and giving suitable complements; the specific functions, the origin, and its development from the past to the present day. The findings significantly demonstrate that the numerous foods generated from cassava roots and leaves, covering staple foods, light meals, side dishes, and drinks, are manifestation of Indonesian cultural diversity. More importantly, this ethnic food in general is also inherent with the Javanese philosophy on living in harmony between humans and the nature surrounding that should be well managed. These two points underline that cassava-based food identity is not a mere cultural expression. It is built by Javanese communities through their natural experiences, simple knowledge, and hard efforts to make cassava-based foods still exist in agreement with the developing era.