It's only available to fans, so if you aren't already, become one. And it's only available today (and the coupon expires March 4), so you better act fast.
To get your free package of Chips Ahoy cookies you need to buy one package of Nabisco cookies (4 oz. to 26 oz.) and one gallon of milk. It's the first of Nabisco's "buy-one-get-one" deals that will be available to Facebook fans on the first of every month.