Use this extension to disable/enable cookies on the current site.
It’s a simple switch: click to disable, click to enable.
It works on “per host” basis and will disable cookies for the domain only (the site opened in the currently selected tab). It will not stop third-party cookies set by the current site (analytics etc.) — to disable third-party cookies you should use the respective content settings (chrome://settings/content/cookies)
When you disable cookies, it will delete cookies set by this site and will reload the current page. (Auto-reload/delete can be disabled in the Options page)
There are some options available, but basically, the extension does just that and nothing more.