How to set or remove individual cookies?

Hi all,
I really like traefiks approach to modifying requests before forwarding them through middlewares. However, I'm currently trying to set or just remove the value of one specific cookie before forwarding it. In nginx this can be achieved by applying some regex to the cookie header, but I can't find a way of achieving this in traefik (version 2). Am I missing something or is this currently not possible?