In the age of social media, are you even really engaged if you don't post a photo of your hand wearing the ring somewhere? In that vein, a new trend sees engagement cookies that are designed to match those hand photos. The trend is driven by Instagram, and typically shows the bride-to-be's ringed hand holding a matching cookie. They're so popular that bakeries in major cities are designing these cookies specifically to match their customer's specifications. Some even use the cookies as wedding favors.