If you want to delete all cookies and site data, go to the "All cookies and site data" page in settings (chrome://settings/siteData) and click delete all. This

If you want to delete all cookies and site data, go to the "All cookies and site data" page in settings (chrome://settings/siteData) and click delete all. This also deletes Google cookies. If you just want to browse without your existing cookies, I suggest opening a Guest Window. Just open the "Current User" menu and then "Open Guest window". That way you don't have to delete them at the end. This is assuming you're in good faith trying to delete cookies, and just can't figure out how.