While its original wheated bourbon is only 90-proof, this new bourbon ranges between 110-130-proof, depending on the batch.

The first letter, ‘O' tells us that the bourbon was produced at the Four Roses Distillery. Notice that all recipes begin with ‘O'. The second letter, ‘B', tells us which mash bill has been used.

Produced at the Four Roses Distillery in Lawrenceburg, Kentucky, it is known for using ten unique bourbon recipes utilizing different mash bills and yeasts. This careful craftsmanship results in a ...

This is a gross oversimplification of the likely, more complicated answer: “I drink bourbon—both ... as much rye in the recipe as there is corn. The second mash bill is made from 85% corn ...