Maker's Mark has actually made a special "high proof" version of their signature Straight Bourbon. But that tasty power-dram is usually just available at the distillery. A few years ago they started doing an annual holiday release of this high-test Spirit, and it’s coming around again this year. Maker's Mark 101 Proof Kentucky Straight Bourbon Whiskey is the same Maker's Mark we all love with the same wheated mash bill — 70% corn, 16% wheat, and 14% malted barley. And it is aged "around six years" — famously being bottled when ready. The difference is that Maker's Mark 101 is delivered at 101 proof (50.5% ABV).