A significant percentage of the world's Bourbon whiskey is made in the area I live (Central Kentucky). Know some guys who work at the various distilleries hereabouts. I don't know if any of them know the exact recipe but, one thing that they all tell me; it is absolutely critical to the taste of whiskey in what it has been aged and for how long. Wooden barrels made of mature white oak trees cut from river valley areas in Western Kentucky or Missouri are preferred. Some of these distilleries actually own large tracts of land simply to cut oak trees from. The inside of the barrel has to be fired and the charcoal activated a certain way. During the several years of aging, the more consistent you can keep the temperature of the barrel, the better the taste. In the large barrel warehouses around here, those barrels toward the outside of the warehouse, where the temperature fluctuates more, will be the cheaper whiskey, those toward the center of the warehouse, even though it may be exactly the same recipe, will be the more expensive stuff. Some of these distilleries bottle several different brands of Bourbon all of which started out with the same recipe but, are sorted out differently by taste and alcohol content based on length of time aged and where in the warehouse the particular barrel sat all of those years. It is a real art to come up with good Bourbon whiskey apparently, that what makes it so good! :hatsoff: