Knob Creek Bourbon has announced its newest product: Knob Creek Quarter Oak.

This limited-time release takes the brand’s Kentucky Straight Bourbon Whiskey and finishes it for a minimum of four years in quarter-cask American oak barrels to increase the amount of contact between the whiskey and wood, the company says. A small amount of this secondarily finished whiskey is then mixed with Knob Creek Kentucky Straight Bourbon to create the final product.

“When my dad created Knob Creek in the early ’90s, he wanted to bring back the big, bold flavors that bourbon offered before the days of Prohibition,” says Fred Noe, Booker Noe’s son and Beam Family seventh-generation master distiller. “Dad loved to experiment in his quest for flavor, and I like to think we carry on that same spirit today with releases like this. Finishing our full-flavored liquid in quarter casks delivers a really nice, deepened wood flavor to the bourbon our fans enjoy.”

Knob Creek Quarter Oak is 100 proof. On the nose is brown sweets, char and toasted oak with hints of dried fruits, the company reports, before a palate of sweet, heavy oak with background notes of char, dried fruits and brown spices. The finish is slightly sweet charred oak with a lingering dryness.

Knob Creek Quarter Oak is now available nationwide, with a suggested retail price of $49.99 for a 750-ml. bottle.