This month’s issue of Cook’s Illustrated claims that they significantly improved the blind taste test scores of several brands of bourbon costing less than $15/750ml by adding ¾ teaspoon of Vanilla Extract, 1/8 Teaspoon of Liquid Smoke and 1 Tablespoon of Dry Sherry to each bottle. They used a bottle of 12 year old W.L. Weller as the benchmark to compare them to.