Bourbon vs. Whiskey: What's the Difference

The Short Answer

Bourbon is a type of whiskey. Whiskey is the broader category. All bourbon is whiskey, but not all whiskey is bourbon. To legally be called bourbon, a whiskey must:

1. Be made in the United States

2. Contain at least 51% corn in its mash bill

3. Be aged in new, charred oak barrels

4. Be distilled to no more than 160 proof

5. Enter the barrel at no more than 125 proof

6. Be bottled at a minimum of 80 proof

Whiskey, on the other hand, is a broad family of distilled spirits that includes bourbon, rye whiskey, Scotch whisky, Irish whiskey, Canadian whisky, Japanese whisky, and many other regional styles.

How Whiskey Is Made

1. Mashing - The grains are milled and mixed with hot water. Heat activates natural starches, converting them into sugars that yeast can consume.

2. Fermentation - Yeast transforms those sugars into alcohol while creating hundreds of flavor compounds that will survive distillation.

3. Distillation - The fermented liquid is heated in copper pot stills or column stills. Alcohol vapor rises, condenses, and becomes a stronger, cleaner spirit.

4. Aging - Freshly distilled whiskey is clear. Its rich amber color—and much of its flavor—comes from years spent inside oak barrels. During aging, the spirit extracts compounds from the wood while oxygen slowly softens harsh edges.

This is where whiskey develops many of the flavor's enthusiasts love:

• Vanilla

• Caramel

• Toasted oak

• Baking spice

• Chocolate

• Leather

• Dried fruit

• Smoke

• Honey

The barrel isn’t simply a storage container. It’s one of the most important ingredients in the finished whiskey.

5. Bottling - Once maturation is complete, the whiskey may be blended, proofed with water, filtered, or bottled directly from the barrel depending on the producer’s style.

Whiskey Around the World

Although every whiskey begins with grain, each region has developed its own traditions.

1. Scotch Whisky - Produced exclusively in Scotland, Scotch is often made primarily from malted barley and may develop smoky flavors through the use of peat.

2. Irish Whiskey - Typically known for a lighter, fruit-forward profile with exceptional smoothness.

3. Canadian Whisky - Often blended and approachable, with many expressions emphasizing balance and spice.

4. Japanese Whisky - Inspired by Scottish techniques but refined with meticulous craftsmanship, Japanese whisky often highlights elegance, precision, and subtle complexity.

5. American Whiskey - America produces several styles, including Bourbon, Rye whiskey, Tennessee whiskey, American single malt, Corn whiskey

Among them, bourbon has become the country’s signature spirit.

What Makes Bourbon Different?

Bourbon follows the same fundamental production process as every other whiskey. The difference lies in strict legal standards that protect both quality and identity. Unlike many spirits, bourbon isn’t defined by where it’s most famous. It’s defined by how it’s made. Bourbon Must Contain at Least 51% Corn.

This is the defining rule.

Corn gives bourbon its signature richness and natural sweetness.

That’s why many bourbons display notes of:

• Vanilla

• Caramel

• Brown sugar

• Maple

• Toffee

• Toasted oak

• Cinnamon

• Baking spices

The remaining grain bill shapes the whiskey’s personality.

A traditional bourbon mash bill may include:

• 65% corn

• 20% rye

• 15% malted barley

Replace rye with wheat and the whiskey often becomes softer, rounder, and creamier.

Increase the rye content and bold peppery spice begins to emerge.

This is why two bourbons can taste completely different while following the exact same legal requirements.