Maker's Mark Cask Strength Kentucky Straight Bourbon Whiskey is Maker's Mark Bourbon in its purest form. Bottled at barrel proof and non-chill filtered, Maker's Mark Cask Strength ranges from 108 to 114 proof depending on the barrels. Made from a mash of corn, wheat, and malted barley, the bourbon was aged for approximately six years before being bottled at cask strength. Surprisingly smooth, this bourbon retains the signature, front-of-the-palate flavors of Maker's Mark while amping up the notes of oak, caramel, vanilla, and spice. It offers big oak, vanilla, and smoky charcoal aroma. The taste is richer, more robust flavors of spice, vanilla, and smoke. It gives a long finish on the front of the tongue with no roughness or bitterness. Maker's Mark 115.5 Proof Cask Strength allows the bourbon flavor to stand up to whatever you mix it with. It's especially fabulous in classic cocktails. Enjoy!