Vivian Marlowe
Bourbon whiskey is a barrel-aged American whiskey made primarily from corn (maize). The term proof refers to how strong a spirit is, indicating its alcohol content. In the United States, proof is defined as twice the percentage of ABV. Bourbon typically falls between 80 and 100 proof, with many aficionados considering 100 proof to be the benchmark of authenticity. Flavored whiskeys, on the other hand, tend to have a lower proof. The proof of a bourbon can be influenced by various factors during its production, including the type of oak barrel used, the aging process, and the addition of water or other ingredients during bottling.
| Characteristics | Values |
|---|---|
| Typical proof range | 80-100 |
| Flavored whiskey proof | 70 |
| Barrel proof upper limit | 125 |
| Alcohol by volume | 40% minimum |
| Alcohol by volume (barrel) | 62.5% maximum |
| Alcohol by volume (distillation) | 80% maximum |
| Alcohol by volume (bottling) | 80% minimum |
| Alcohol by volume (100 proof) | 50% |
| Alcohol by volume (80 proof) | 40% |
| Alcohol by volume (70 proof) | 35% |
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What You'll Learn
Bourbon's alcohol content is measured in proof
Bourbon is a strong spirit with a rich history and a dedicated following. The proof of a bourbon refers to its alcohol content, with 100 proof being a traditional benchmark for spirits of high authenticity. In the United States, proof is defined as twice the ABV or alcohol by volume. So, a 100-proof bourbon contains 50% ABV. The higher the proof, the higher the alcohol content.
Bourbon usually falls between 80 and 100 proof. For example, Ezra Brooks Kentucky Straight is 90 proof, while special variants such as Rebel Yell’s 10-Year Single Barrel or David Nicholson Reserve are bottled at 100 proof. Flavored whiskeys, on the other hand, are typically lower proof. For instance, Rebel Yell Ginger Whiskey and Rebel Yell Root Beer are 70 proof with 35% ABV. The lower alcohol content in flavored whiskeys makes for a more congenial sip and allows you to better appreciate the flavor.
The term )"proof" dates back to 16th-century England, where spirits were taxed based on alcohol content. A liquid just alcoholic enough to maintain combustion was defined as 100 proof and was the basis for taxation. This method evolved into the modern proof system. In 1848, the United States established a standard for measuring alcohol content based on the percentage of alcohol, and in 1897, the Bottled-in-Bond Act mandated that all American whiskey labelled as "bottled-in-bond" must be bottled at 100 proof.
Bourbon must be distilled to a maximum of 80% ABV or 160 proof. It must enter the barrel at no more than 62.5% ABV or 125 proof and be bottled at no less than 80 proof or 40% ABV. Bourbon gains more color and flavor the longer it ages in wood, and maturity, rather than a particular age, is the goal, as over-aging can negatively affect the flavor. Some bourbon fans prefer their bourbon straight from the barrel, at a proof closer to what it was originally barreled at. For example, Lux Row offers "barrel-proof" or "cask-strength" products with a higher percentage of alcohol, such as Ezra Brooks' Old Ezra Barrel Strength, a Kentucky straight bourbon aged for seven years and bottled at 117 proof.
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Bourbon is typically between 80 and 100 proof
Bourbon is a strong spirit with a rich history and a dedicated following. The proof of a bourbon refers to its alcohol content, and bourbon is typically between 80 and 100 proof. The term "proof" is used only in the US for stronger spirits with 40% or higher ABV, like bourbon, whiskey, vodka, gin, and rum. To understand proof, you need to do some math: proof is twice the ABV of the spirit. So, an 80-proof bourbon is 40% ABV, and a 100-proof bourbon contains 50% ABV.
The higher the proof, the higher the alcohol content. Many bourbon enthusiasts consider 100-proof to be a benchmark for authenticity. Flavored whiskeys, for example, are typically lower proof. The Bottled-in-Bond Act of 1897 mandates that all American whiskey labelled as "bottled-in-bond" must be bottled at 100 proof. This is also a requirement for bourbon to be called "straight bourbon".
Bourbon is distilled to typically between 65% and 80% alcohol, and must be distilled to a maximum of 80% ABV (160 proof). It must enter the barrel at no more than 62.5% ABV (125 proof) and be bottled at no less than 80 proof (40% ABV). Bourbon cannot be bottled at more than 125 proof.
Bourbon gains more colour and flavour the longer it ages in wood. Changes to the spirit occur due to evaporation and chemical processes such as oxidation. The type of oak barrel can have a profound effect on the final taste, along with the barrel's size and how charred it is. Bourbon also improves as it spends more time in the barrel, with whiskey forced in and out of the barrel's wood as temperatures fluctuate, adding vanilla-like flavours and a more complex taste.
Some bourbon fans love the idea of getting it straight from the barrel, at a proof closer to what it was originally barreled at. For those drinkers, distillers such as Lux Row now sell "barrel-proof" or "cask-strength" products with a higher percentage of alcohol.
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100 proof is considered the benchmark for authenticity
Bourbon is a strong spirit with a rich history and a dedicated following. The term "proof" relates to the alcohol content in a spirit and is shown as a percentage. In the United States, proof is defined as twice the percentage of ABV. So, to calculate the percentage of alcohol in a bottle of bourbon, you simply divide the proof by two. For example, 80-proof bourbon is 40% ABV.
The Bottled-in-Bond Act of 1897 mandates that all American whiskey labelled as "bottled-in-bond" must be bottled at exactly 100 proof. Many bourbon aficionados consider 100 proof to be the traditional benchmark of a spirit that meets certain high standards of authenticity. This is because 100-proof bourbon contains 50% ABV, with the other half consisting of water, flavour compounds, and any other additives. Flavoured whiskeys, for example, are typically lower proof.
Some bourbon fans prefer their bourbon straight from the barrel, at a proof closer to what it was originally barreled at. For those drinkers, distillers such as Lux Row now sell “barrel-proof” or “cask-strength” products with a higher percentage of alcohol. For example, Ezra Brooks’ Old Ezra Barrel Strength is a Kentucky straight bourbon, aged for seven years and bottled at 117 proof.
Bourbon usually falls between 80 and 100 proof. For instance, Daviess County bourbons are bottled at 96 proof, or 48 percent alcohol. Special variants, such as Rebel Yell’s 10-Year Single Barrel or David Nicholson Reserve, are bottled at 100 proof.
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Bourbon is diluted with water to reach the correct proof
Bourbon is a strong spirit with a rich history and a dedicated following. The proof of a bourbon refers to its alcohol content, with 100 proof being a traditional benchmark for spirits of high authenticity. A bottle of 100-proof bourbon contains 50% alcohol by volume, with the other half consisting of water, flavour compounds, and any other additives.
The term "proof" dates back to 16th-century England, where spirits were taxed based on alcohol content. A liquid just alcoholic enough to maintain combustion was defined as 100 proof and was the basis for taxation. This method evolved into the modern proof system. In the United States, proof is defined as twice the percentage of ABV. So, to calculate the percentage of alcohol in a bottle of bourbon, you simply divide the proof by two. For example, 80-proof bourbon is 40% ABV.
Bourbon is typically aged in charred new oak containers, where it gains its colour and flavour from the caramelized sugars and vanillins in the charred wood. The longer it ages, the more colour and flavour it gains. However, over-aging can negatively affect the flavour, making it taste woody, bitter, or unbalanced. After maturing, bourbon is typically filtered and diluted with water to reach the correct proof. This process is known as bottling or bottling operations.
The bottling operation for bourbon involves filtering, mixing together straight whiskey from different barrels (sometimes from different distilleries), diluting with water, blending with other ingredients (if producing blended bourbon), and filling containers to produce the final product. The phrase "bottled by" means that the bottler did not operate the distillery that produced the whiskey. If the distillery and bottler are the same, then "distilled by" may be added to the label.
Some bourbon fans prefer their bourbon straight from the barrel, at a proof closer to what it was originally barreled at. These bourbons are referred to as "cask strength" or "barrel proof" and are bottled at a higher percentage of alcohol. For example, Ezra Brooks' Old Ezra Barrel Strength is a Kentucky straight bourbon, aged for seven years and bottled at 117 proof.
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The type of oak barrel affects the proof and flavour
Bourbon is a strong spirit with a rich history and a dedicated following. It is a type of barrel-aged American whiskey made primarily from corn (maize). Bourbon usually falls between 80 and 100 proof, with many aficionados considering 100 proof to be the traditional benchmark of a spirit that meets certain high standards of authenticity. Flavored whiskeys are typically lower proof.
The type of oak barrel in which bourbon is aged has a profound effect on its qualities, resulting in unmatched spirits in depth and complexity. Whiskey’s flavor is significantly and multifacetedly affected by oak barrel maturation, with the oak imparting a wide range of flavors and scents that develop over time. The longer a spirit spends in an oak barrel, the more character it develops. It becomes richer and mellower, and its vanilla and toast notes evolve into butterscotch, honey, brown sugar, creamy crème brûlée, and spice.
The specific type of oak, the origin of the tree, and the finer points of its treatment during production will influence the flavors the barrel imparts. For instance, bourbon aged in Quercus alba, or American white oak, will differ from that aged in European oak due to the former's vanillin content and wide grain. Additionally, the climate and soil conditions in which the oak tree is grown will impact the flavor it imparts, with oak from warmer climates like northern Georgia, Alabama, and southern Tennessee having broader growth rings than that from colder climates like Minnesota and Wisconsin.
The charring of the oak barrel also affects the flavor of the bourbon. The charring of the interior of the barrel introduces smoky and caramelized notes to the spirit, further enhancing its complexity and richness. The younger the barrel, the more "extract" it will produce, resulting in more intensely flavored whiskey.
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Frequently asked questions
Bourbon flavoring is not a pure form of alcohol, so it does not have a proof associated with it. Bourbon, on the other hand, typically falls between 80 and 100 proof.
The term "proof" relates to the alcohol content in a spirit and is shown as a percentage. In the United States, proof is defined as twice the percentage of ABV. So, a spirit with 40% ABV is 80 proof, and 100 proof bourbon contains 50% ABV.
There is no set rule for the proof of bourbon when it is placed into a barrel to age, other than that it cannot exceed 125 proof (62.5% ABV).
