The invention relates to a coating for freshly pre-prepared potatoes, to the method for the application thereof and to the end product of portions of coated and packed potatoes. The coating includes a matrix of modified potato starch, preferably hydroxypropyl distarch phosphate, and anti-browning agents: sodium ascorbate, calcium ascorbate and citric acid. It is an alternative to sulfite derivatives or metabisulfite, which prevents browning of the packaged potato. The use of pregelatinised modified starch allows the production and application of the coating to be simplified and cheapened.