The cheapest possible meal you can buy a woman so she will sleep with you. If you play it right, you can get her to pay for her meal, give her the cookie, and tell her some smooth romantic bullcrap that she can't read her fortune until she eats at least half the cookie. Stare into her eyes deeply. Classic line + clueless chick = free sex. This usually works best on desperate ugly women.
I gave Mary a fortune cookie and told her that she couldn't read the fortune until she ate half the cookie. Oh yeah, she bought it!