If you don't have breadcrumbs, you can use the following substitutes to fry potato croquettes:

1, flour: sprinkle some flour on the surface of potato croquettes before frying.

2, breadcrumbs: if you don't have breadcrumbs, you can use breadcrumbs instead, just crush the breadcrumbs and spread them on the surface of the potato balls.

3, sesame seeds: toast some sesame seeds and grind them into powder, then sprinkle them on the surface of the potato balls before frying.