Maker's Mark Cask Strength Whisky - Maker's Mark Cask Strength Whisky is crafted due to the extraordinary demand for barrel strength whisky (and perhaps in answer to the outraged response when the distillery announced they were going to reduce their proof to 42% ABV – a decision they reversed). Makers Mark amps up the front-of-the-palate flavors of Maker's Mark. In other words, it's Maker's with a lot more Maker's. But the higher alcohol content of our Cask Strength isn't the story here - it's the taste. More of the signature flavors of rich oak, vanilla, caramel and spice.