Historically, Bourbon Making And Farming Go Hand-In-Hand
“Corn you eat as corn on the cob is an immature stage called the milk phase. It's harvested when the stalks are green and the kernels are soft. When harvesting corn for distilling, you wait for the corn to dry–when the stalks are brown and the kernels are dry.”
When we first planted the Bloody Butcher corn, it was in a field next to a regular field of corn. The wildlife—deer and turkey—passed through the regular corn to eat the Bloody Butcher corn. The wild life had a choice, and they chose the Bloody Butcher corn. That's when we knew we had something special.”
But why are so many distilleries using the same Yellow Dent corn when heirloom varietals can yield varying flavor profiles? Aside from consistency and cost, it all boils down to the course of American agriculture through history.
Historical Shifts In Agriculture Have Changed Our Whiskey
“Modern dent corn started as a hybrid between open pollinated Gourdseed corn and Eastern Flint corn in the 1830-50s. By the late 1920s hybrid vigor was understood as greatly increasing yields from 60-70 bushels per acre to 100 plus. Unfortunately taste was not taken into account.”
That’s not to say that the Whiskey being made from Yellow Dent Number Two corn is bad. We can see from the various flavor profiles available in traditional Kentucky Bourbons that there are other factors at work, such as yeast and maturation. But if you want to make something truly unique, heirloom corn is one way to achieve that.
Heirloom Corn Can Also Be The Spice Rack
“At Ironroot Republic we use a variety of heirloom corns. Purple corn, Bloody Butcher, and Floriani Flint are staple flavoring grains in some of our Bourbon and Corn Whiskey mashbills; however, we are also experimenting with Magic Manna, Oaxacan Green, Black Aztec, and Amanda Palmer corn - a gift from Alan Bishop."
"I refer to them as flavoring grains because as Rye and Wheat are generally used in smaller percentages in traditional Bourbon mashbills, we use the heirloom varietals in a similar manner,” says owner and Head Distiller Jonathan Likarish.
According to Likarish, “This is due to multiple reasons including the relatively high costs of heirloom corns, typically lower alcohol yields associated with heirloom corns, and a desire to showcase the flavor of locally grown grains in our spirits. Many of the heirloom corns are hard to source and when found, are costly comparative to regular yellow dent.
The increased cost is a result of not only rarity of seed, but also because of increased difficulty of cultivation and a lower yield in terms of bushels per acre. Many of the corns commonly used to eat have been either bred or modified to produce extremely high yields per acre, be disease and drought resistant, and most importantly, taste very sweet.”
That sweetness in modern corn production has a purpose, which is apparent in most modern-day Whiskey production, says Likarish: “In general, by increasing sweetness the carbohydrate content of the corn is increased and in turn the protein content is reduced. For most heirloom varietals, the opposite is true. They usually have a higher protein content by comparison."
From a distilling perspective, the decreased carbohydrate content and increased protein content usually results in lower alcohol yields with increased complexity of flavors. By blending our heirloom corns with our locally grown non-genetically modified yellow dent corn, we are able to achieve both the alcohol yields we need along with the complexity of flavors we desire.”
Remember all those different amino acids from the different colors of corn Bishop was talking about?
They make some very different flavors in the end product, according to Likerish: “Through distillation we not only concentrate alcohol, we also concentrate flavors. In the case of Bloody Butcher corn we extract sweet dark berry flavors."
"For Purple corn we find an array of baking spices ranging from cinnamon to clove. Floriani is strange, with spice similar to cayenne but other flavors that fall more in an umami category and dark chocolate notes. Magic Manna smells and tastes like fresh baked sugar cookies and Oaxacan Green has Jalapeño spice and cocoa notes.”
While most of the non-GMO Yellow Dent corn they use is grown nearby, the heirloom varietals are harder to come by and often have to come from farther away by necessity. But this gives Ironroot Republic what Likarish calls a “spice rack” of flavors from which to choose.