with a process for manufacturing compostible thin - walled molded articles such as cups , plates , fast - food packagings , trays , flat sheets and the like , by applying a starch - based baking composition on the lower part of a multipart , preferably bipartite mold , to obtain a tough , durable article of high mechanical stability by using an essentially fat - free baking composition composed of water , a starch product , a release agent , and optionally further conventional additives , by baking the baking composition filling the mold , and by conditioning the resulting product to establish a moisture content of 6 - 22 % by weight , the invention proposes the use , in addition to or instead of starch , of at least one modified starch selected from the group comprising starch esterified with organic acids or phosphoric acid , etherified starch , cross - linked starch and starch capable of being modified by ionic interaction .