Rye whiskey can refer to two different, but related, types of whiskey: American rye whiskey, which is similar to bourbon whiskey, but must be distilled from at least 51 percent rye grain, Canadian whisky, which is often referred to as (and often labelled as) rye whisky for historical reasons, although it may or may not actually include any rye grain in its production process. Rye grain must make up at least 51% of the mash bill of a rye whiskey in the United States. In the United States, rye whiskey is, by law, made from a mash of at least 51 percent rye. (The other ingredients in the mash are usually corn and malted barley.)[citation needed] It is distilled to no more than 160 U.S. proof (80% abv) and aged in charred, new oak barrels. The whiskey must be put in the barrels at no more than 125 proof (62.5% abv). Rye whiskey that has been aged for at least two years and has not been blended with other spirits may be further designated as straight, as in “straight rye whiskey”. Rye whiskey was historically the prevalent whiskey in the northeastern states, especially Pennsylvania, New York and Maryland. Pittsburgh was the center of rye whiskey production in the late 1700s and early 1800s. By 1808, Allegheny County, Pennsylvania farmers were selling half a barrel for each man, woman and child in the country.By the 1880s, Joseph F. Sinnott’s distillery, Moore and Sinnott, located in Monongahela, Pennsylvania, was the largest producer of rye whiskey, with a capacity of 30,000 barrels a year.[4][5] In 1886, rye whiskey was produced in 17 states. Rye whiskey largely disappeared after Prohibition. A few brands, such as Old Overholt, survived, although by the late 1960s former Pennsylvania brands like Old Overholt were being distilled mostly in Kentucky. In the early 21st century, an expanding number of rye whiskey brands are produced by Campari Group (Wild Turkey Rye), Diageo (George Dickel Rye and Bulleit Rye), Heaven Hill (Pikesville Rye and Rittenhouse Rye), Beam Suntory (Old Overholt and Jim Beam Rye), The Sazerac Company (Col. E. H. Taylor, Sazerac Rye, and Thomas H. Handy), and various smaller companies. A particularly large producer is MGP of Indiana (formerly known as Lawrenceburg Distillers Indiana), which is a distiller for many brands that are marketed by others (including some of the large companies previously listed). Rye whiskey has been undergoing a small but growing revival in the US Since the beginning of the 21st century, more producers have been experimenting with rye whiskey, and several now market aged rye whiskey. For example, Brown-Forman began production of a Jack Daniel’s rye whiskey and released unaged and lightly aged versions as limited editions. A reconstructed distillery at Mount Vernon (the estate of George Washington) sells a rye that is similar to the whiskey Washington made. At its peak, Washington’s original distillery was among the largest producers of rye whiskey in the United States, averaging 11,000 US gallons (42,000 L; 9,200 imp gal) per year.In 2023, Maryland passed legislation naming Maryland rye whiskey as the state’s official liquor. Differences between rye and bourbon Rye grain is known for imparting what many call a spicy or fruity flavor to the whiskey. Bourbon, distilled from at least 51% corn, is noticeably sweeter and tends to be more full-bodied than rye. As bourbon gained popularity beyond the southern United States, bartenders increasingly substituted it for rye in cocktails such as the whiskey sour, Manhattan, and Old Fashioned, which were originally made with rye. All other things being equal, the character of the cocktail will be drier (i.e., less sweet) with rye.While straight rye is defined as having a minimum of 51% rye in the mash bill, there are other (albeit unofficial) types that exist: Maryland, Pennsylvania and Kentucky styles. Maryland-style is defined as containing 65-70% rye and 30-35% corn in the mash bill, and generally has a sweeter flavor. Pennsylvania-style, also called Monongahela rye, is defined as containing at least 95% rye in its mash bill, and is generally spicier. So the more rye in the mash bill, the spicier the whiskey should be, aging notwithstanding.entucky-style rye, however, is characterized by even sweeter profile than Maryland-style, as its mash bill is normally 51-55% rye, with the remaining grains being a mix of corn and malted barley. Because of its relatively low rye content, it’s more akin to standard straight rye whiskeys and is comparable to high-rye bourbons.[15]