Canon cookies are apparently a tasty snack specially baked with infusions of canon-y goodness. Also chocolate chips. They are distributed to those who have done something spiffy, are new or having a birthday, or are suffering from mild badfic-induced stress. Or anytime, really. It's always a good time for Canon Cookies! (Look for peanut butter and iced sugar cookies, coming soon!)
They came from the ones who created the Pan Galactic Gargle Bleeprin Blaster so discretion would be advised until an oldbie can vouch for edibility (and freshness).