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Our Bourbon Process

To us, making bourbon has never been a job—it’s an art. Every ingredient, every shift in the weather and every oak stave blend together to make Jim Beam the World’s #1 Bourbon.
Here’s a crash course on how it’s done. 

Step 1 

Secret recipe
Begin with a mix of corn (at least 51%), rye and malted barley. We like to call it our “mash bill.” This feeds into a 10,000-gallon cooker where we add some “setback” (a bit of old mash from our last distillation) for consistency and transform our mash into “sour mash.”
Secret recipe
Kentucky water

Step 2:

Kentucky water
It’s no coincidence that 95% of all bourbon comes from Kentucky. You see, Kentucky’s limestone-filtered water contributes to the flavour and appearance of our bourbon. This helps to craft the slightly sweet, golden-brown bourbon we all know and love.

Step 3:

Bring on the yeast
Once cooked, our sour mash goes to the fermenter, where it gets cooled and yeast is added to eat sugars and create alcohol. But not just any old yeast—the same strain we’ve been using since Prohibition ended. It’s a closely guarded family secret—so guarded, in fact, that Jim Beam himself would take home a jug of yeast every weekend for safe keeping. A tradition his great-grandson still upholds today. 
Bring on the yeast
smooth flavour

Step 4:

smooth flavour
After fermentation, we’re left with “distiller’s beer” that gets heated
to around 200°F—enough to turn the alcohol to vapor, separating it
from the other ingredients. That vapor then turns back into a 125-proof liquid or “low wine” that flows into a doubler (similar to a pot still) for a second distillation. The next time the vapor condenses, it will be
a less-than-160-proof “high wine.”

Step 5:

The wood whiskey ages in has a lot to do with its final flavour. At Jim Beam, we tap our high wine into brand-new, level-4 char, American White Oak barrels. We call this “alligator char” because, after being fired, the inside of the barrels have the bumpy look of a gator’s skin. This also caramelises the sugars within the wood to create a richer flavour with fewer tannins.
Age of bourbon whiskey

Step 6:

Age of bourbon whiskey
After filling our barrels, we roll them into our airy rackhouses to rest. As the seasons change, the charred-barrel wood expands and contracts, allowing bourbon to extract its caramelised sugars, oak flavour and golden-brown colour. According to U.S. law, two years gets you Straight Bourbon Whiskey. But four years gets you the smooth, mellow flavour of Jim Beam.