Makerâs Mark has actually made a special âhigh proofâ 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 itâs coming around again this year. Makerâs Mark 101 Proof Kentucky Straight Bourbon Whiskey is the same Makerâs Mark we all love with the same wheated mash bill â 70% corn, 16% wheat, and 14% malted barley. And it is aged âaround six yearsâ â famously being bottled when ready. The difference is that Makerâs Mark 101 is delivered at 101 proof (50.5% ABV). And friends⊠it makes a difference. A very good difference.