Old Medley 12 Year Old Kentucky Straight Bourbon Whiskey is also made using a family recipe of corn, rye and barley. The grains are fermented with an eight-generation old yeast strain (the exact type of yeast used remains a closely guarded family secret) before being twice distilled twice through a copper-pot still and matured in new, charred American oak casks for twelve years. The bourbon has a slightly grainy aroma, with touches of wood spice, rye and aged vanilla. The aroma gives way to notes of sweet pecan, caramel and oak, and leads to a warming, slightly sweet finish.