"Unsets" a cookie (due the nature of cookies, this will actually ADD the cookie to the response but the cookie expiration date will be in the past).
{% unset_cookie cookieName1 [cookieName2] [etc...] %}
You may also include reference variables, which will be dereferenced to their cookie names before unsetting the cookies.
There is no option to unset all cookies - cookies must be individually removed.
Unset Cookie
CopyUnset multiple Cookies
Copy