Also, not to be confused with being crazy, or kooky. I believe that's spelled kookiness. So yeah, don't confuse them. Or else.
1) The Cookie Monster is a prime example of a creature simply overflowing with Cookieness.
2) Paul: *watching Sesame Street:* Hey John, that Cookie Monster seems to be a prime example of a creature simply overflowing with Cookieness.
John: You mean kookiness?
Paul: D*mn it, John, this is why I never watch TV with you.