If you care a lot about your online security then you might see browser cookies as a potential threat. Though cookies are used by different websites in authentication process, cookies can also store your personal data or track your browsing habits and activities online.
You can use Vanilla browser extension for chrome to maintain a whitelist of cookies which you need and rest can be deleted automatically according to the preferences selected by you in extension setting page. You can select option of deleting cookies every 30 minutes or can delete cookies on start-up of browser.
New sites can be added to whitelist easily by clicking the vanilla icon in address bar. You can also clear all unwanted cookies from there.
You can download Vanilla for chrome from extension page.