Chocolate

Block chocolate was out of period (sorry), but I'm told that some regions of Spain drank the spiced chocolate drink based on the original recipes of the new world.

Xocolatl (the bitter, spiced chocolate drink) was drunk by the Mayans and transported to the Old World - the website below (if still active) has a recipe for this: http://www.livejournal.com/users/kiad/325080.html

Kingdom law in Ealdomere has declared chocolate to be legally period.

Also here's a discussion on chocolate in period http://www.florilegium.org/files/FOOD-SWEETS/chocolate-msg.html