06/04/2019
What may look like a tiny wooden hot tub is really an oak barrel for aging whiskey...besides Russ would need a much larger hot tub.
Oak plays a big role in aging spirits. There are three main types used for aging: American oak, French oak, and Hungarian oak. There are different levels or toasting and charring that will bring out specific flavors, but here are the highlights/differences:
American oak imparts more intense oak flavor with high vanilla and coconut, and can give honey/caramel, roasted coffee and cocoa notes when more heavily toasted.
French oak is much softer than its American counterpart with the main difference being more tannins and spice flavors such as nutmeg, clove, allspice and ginger.
Hungarian oak is somewhere in the middle with clove, cinnamon and black pepper flavors with butterscotch, toffee, cocoa and molasses with heavier toasting.
These are general differences and these flavors are never guaranteed. Oak is sourced from different forests with different weather patterns, water sources and soil components that add unique qualities. Each tree is different and seasoning the wood before using it for aging also changes the flavors.
Furthermore there are barrels, staves, cubes, chips, spirals and probably more oaks forms used for aging or imparting flavor. However, the traditional manner uses barrels and every barrel is different which only adds to the mystery and magic of "how does this taste so good?"
Enjoy
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