If you like vanilla things...STOP IMMEDIATELY! The flavor may be coming from beaver butt extract. The FDA says that it smells and can taste (paired with the right other ingredients) like vanilla. Worst of all, on the ingredients, it will be listed as "natural flavoring". Well, that's true - can't get much more natural then that.
Full story here at the NY Post: http://nypost.com/2013/09/15/beaver-waste-can-be-used-in-baked-goods-sweets/