- A new wave of whiskey makers is turning to heirloom grains—heritage varieties of corn, rye, wheat, and barley—to craft distinctive, grain-forward spirits with complex flavor and character.
- These whiskeys, made in smaller batches from lower-yield crops, highlight regional identity and revive long-forgotten grains like Jimmy Red corn, Horton rye, and purple heirloom corn.
- Bartenders and distillers alike say the use of heirloom grains adds depth and individuality to each pour, offering whiskey drinkers a more expressive, terroir-driven experience.
As distilleries look to make the best products and stand out in a crowded field, one of whiskey’s newest innovations isn’t really new at all. It’s a throwback to the past.
Heirloom grains don’t have a formal definition, but most experts recognize them as grains that existed before modern breeding practices — the days when crops were naturally pollinated and didn’t undergo genetic modifications.
In recent years, heirloom varieties of corn, rye, wheat, and barley have helped make unique, flavorful whiskeys that are grain-forward and loaded with character. It hasn’t been easy. Some of these grains hadn’t been planted for decades and had to be painstakingly revived and cultivated. They offer smaller crop yields, meaning smaller batches of whiskey.
“I think heirloom grains are a lovely opportunity for distillers and drinkers to have conversations about things that one or the other might take for granted,” says Patrick Marran, head bartender at On the Rocks, a whiskey bar in New York City. He says that heirloom grains taste different than commodity grains. It challenges the notion that distillers need mass-produced, modern grains to maintain consistency, or that drinkers expect whiskey to have a uniform taste.
“It’s like grandma’s homemade recipes,” he says. “You can’t always put your finger on it, but it tastes different, and usually better.”
Check out these bartender-approved bottles made with heirloom grains.
Ironroot Republic Hubris Straight Corn Whiskey
Food & Wine / Ironroot Republic Distillery
“One of the most unique distilleries you’ll find is Ironroot Republic in Denison, Texas,” says Nico Martini, author of Texas Whiskey. “Everything they distill is made with Texas-grown grain and aged in North Texas, giving them flavor profiles unlike any other whiskey.”
To experience what they can do with heirloom corn, he suggests Ironroot’s Hubris Straight Corn Whiskey. Martini says that the mash bill includes Red Flint and non-GMO Yellow Dent corn, but the star of this show is the Mexico-born, Texas‑grown heirloom purple corn that dates to the Aztecs. This five-time winner of World’s Best Corn Whiskey is matured in re‑used European oak barrels, so the oak doesn’t overwhelm the grains.
“This is a spectacular departure from overbearing oak-bomb bourbons and has complex flavors ranging from sweet red apples and tangerines to butterscotch, and it has a spicy and sweet finish,” says Martini.
Hard Truth Sweet Mash Wheated Bourbon
Food & Wine / Hard Truth Distilling Co.
This five-year-old, 100-proof bourbon gets an enthusiastic nod from John “Fitzy” Fitzpatrick, spiritual advisor at Warren Delray in Delray Beach, Florida.
“For fans of Weller, Pappy, and Old Fitzgerald, nothing brings forward the velvety-smooth mouthfeel of wheated bourbons more dramatically than the sweet mash process used by Hard Truth for this exceptional whiskey,” he says.
Sweet mash is a process that uses a new yeast strain to start each batch. It differs from the sour mash method, which reuses some of the mash, known as the backset, from the prior batch.
“Wheat traditionally steps back and lets the other grains in the mash bill take center stage,” says Fitzpatrick, but for the Sweet Mash Wheated Bourbon, “the Indiana heirloom corn and heritage barley really shine through.”
He finds lush vanilla, creamy caramel, cinnamon toast, and banana bread across the nose and palate. “The sweet mash process also adds length to the whiskey’s finish that you just never want to end. It’s simply remarkable,” he says.
Hillrock Double Cask Rye
Food & Wine / Hillrock Estate Distillery
New York and Pennsylvania once comprised the “breadbasket” of U.S. grain production. Rye was the most prevalent grain, and the one most preferred for whiskey before the rise of corn and bourbon, says Fitzpatrick.
“Hillrock’s small copper pot stills, #3 and #4 charred American oak barrels, and hand-grown heritage grain from their own fields really highlight the rye at its finest,” he says of the Double Cask Rye. “This special release brings all the rye spice, mint, clove, and cinnamon to the forefront, with the perfect complement of oak and vanilla from the double barreling. More than just spicy and deeply complex, this rye offers a weight on the palate I don’t think I’ve ever experienced before, in a beautiful way. One sip offers a perfect reflection of how great Hudson Valley heritage grains (and whiskey) can be.”
High Wire Jimmy Red Straight Bourbon
Food & Wine / High Wire Distilling
Marran says that High Wire Distillery’s Jimmy Red Bourbon is different from a lot of other entry-priced bourbons due to its South Carolina-grown heirloom strain corn. Jimmy Red corn was grown on James Island for decades before it almost disappeared. The High Wire team worked with a group of researchers and farmers to rebuild the supply.
“It’s full of character,” says Marran. “It’s got a good chew—some mass-produced whiskeys have a thinness that can taste lacking—and it holds up well to all types of cocktails.”
New York Distilling Co. Jaywalk Heirloom Rye
Food & Wine / The New York Distilling Company
Marran has praised New York Distilling Company for years, and he’s especially excited by its Jaywalk Heirloom Rye. The seven-year-old, single-barrel whiskey is made with 75% Horton rye, a variety that dates to the 1800s. Tasting it side-by-side with other ryes, Marran says that you get “much more of a peppery spice than a ginger spice, which plays well with a couple drops or a single cube.”
Jeptha Creed Bourbon
Food & Wine / Jeptha Creed Distillery
Tony Shaw, general manager of Steakhouse Bourré Bonne in Louisville, recommends Jeptha Creed, which features Bloody Butcher heirloom corn in its full line of bourbons. “The grain choice drives deeper cereal sweetness, cocoa, and earthy notes, with a fuller mouthfeel, allowing the grain character to show through before barrel influence,” he says.
WhistlePig Old World Rye
Food & Wine / WhistlePig Whiskey
Shaw also likes WhistlePig’s Old World Rye, which he says is made with heritage rye varieties and finished in a trio of wine casks. “I enjoy it for its depth and complexity,” he says. “Heritage rye brings bold spice, herbal notes, and a slightly rustic earthiness that feels more layered and expressive. The grain choice gives the whiskey structure and intensity, showcasing how rye selection directly shapes aroma, spice, and balance, rather than relying solely on aging or finishing.”
