As bourbon ages, a portion of the liquid is lost from the barrel due to evaporation—that's the "Angel's Share"; after aging, when the bourbon is dumped out of the barrel, a certain amount of whiskey is left trapped within the wood of every barrel
We call that the "devil's cut"
Devil’s Cut™ is a premium bourbon whiskey created using a proprietary process that extracts the liquid trapped inside the wood of the bourbon barrels. The product is a robust premium bourbon with a deep color, aroma and character that showcases notes of wood, oak and vanilla derived from the barrel wood.
To create Devil’s Cut, Jim Beam distillers begin by emptying barrels of extra-aged, six-year Jim Beam Bourbon. The barrels are then agitated through a proprietary process to pull the trapped bourbon and flavors from the barrel wood. The liquid (with the extracted elements it now contains) is then held for an appropriate length of time in a proprietary process until it has developed the proper balance of bourbon notes. In the final step, this special liquid is carefully added back to extra-aged Jim Beam to create the finely-balanced, smooth 90 proof Devil’s Cut Bourbon.