devot:eeDevoted to ExpressionEngine

Set a cookie:

{exp:cookie:set name="chocolate" value="chip" seconds="86400"} 

The seconds parameter is optional, defaulting to 0:

 {exp:cookie:set name="chocolate" value="i am a session cookie"}

And retrieve it in one gulp:

What a delicious {exp:cookie:get name="chocolate"}!

Or savour it, if you prefer:

    {exp:cookie:get_here name="peanut_butter"}

        The value of the exp_peanut_butter cookie is: {peanut_butter}

    {/exp:cookie:get_here}

The name parameter is sans the EE cookie prefix—by default exp_.
You can ascertain the effective EE cookie prefix by viewing the output of the following tag:

 {exp:cookie:prefix}

By default the name of the interpolated variable is the same as that supplied to the name parameter.
If you’d prefer something different then specify a variable paramter.

    {exp:cookie:get_here name="username" variable="cookie"}

        Hello {username}, have a {cookie}!

    {/exp:cookie:get_here}

Delete a cookie:

 {exp:cookie:delete name='chocolate'}