Eagle Rare 10 Year Bourbon is aged for 10 years in charred oak barrels, producing a smooth and very well-balanced bourbon, with strong vanilla and nutty flavors. Eagle Rare is a single barrel bourbon. The whiskey from each barrel is bottled individually with each bottle bearing the barrel number and in most cases the dates for the beginning and end of aging. None of the whiskey is blended, creating a unique flavor for each barrel.