On the day, the casual dining chain will be offering a free Chocolate Chunk Pizookie with no purchase necessary, but only if you order it using the "Dine-In Order Ahead" feature of their smartphone app. The discount is automatically applied when you use the app to order ahead on June 17th.
There's also a $5 off $20 coupon available when you use the "Dine-In Order Ahead" feature.
The Pizookie is BJ's signature over-sized, fresh-baked cookie and comes topped with two scoops of vanilla bean ice cream.