this cant be done with a on text event?

Just make it randomize some cookie name u made up. And put it in a .txt file.

on *:text:!cookie*:#: {
 if ($(,$+(%,flood,$nick))) { return }
    set -u3 $+(%,flood,$nick)

var %cookie = $read(Cookie.txt)
var %cookie2 = $readini(Cookie.ini,cookie,$nick)
var %true = 1
var %false = 0

if ( %cookie2 == %true ) { notice $nick You already have a cookie. You can get rid of it by eating it. (Syntax: !eat cookie) | return }

describe $chan $2 Received a %cookie .
writeini cookie.ini Cookie $nick %true
halt
}

on *:text:!eat cookie:#: {
 if ($(,$+(%,flood2,$nick))) { return }
    set -u3 $+(%,flood2,$nick)

if (%cookie2 == 0) { notice $nick Sorry but you dont have a cookie. Get one by typing: !cookie | Return }

if (%cookie2 == $null) { notice $nick Sorry but you dont have a cookie. Get one by typing: !cookie | Return }

if (%cookie2 == 1) { 
notice $nick You just ate your cookie! 
writeini Cookie.ini Cookie $nick %false
halt
}