Mark and Digger Push Limits to Craft 140-Proof Moonshine for High-Stakes Order

In a bold venture to meet a lucrative but demanding client request, moonshiners Mark and Digger embarked on an ambitious project to produce 100 gallons of 140-proof corn liquor. The client, eager to soak cherries in high-proof alcohol for a potent end product, offered $140 per gallon—a deal too good to pass up. However, the challenge of producing such a high-proof spirit with robust corn flavor pushed the duo to innovate their equipment and tweak their mash recipe, all while navigating the risks of their unconventional setup.

The client’s request stemmed from a practical concern: soaking cherries in 100-proof liquor results in a diluted product, as the cherries’ juices lower the alcohol content to around 60 proof. To achieve a stronger result, the client demanded 140-proof moonshine, which posed a significant challenge for Mark and Digger’s small-scale operation. “It would take us damn 20 runs to get 100 gallons,” Digger noted, highlighting the difficulty of producing such a large volume of high-proof liquor with their existing still. A typical run yields only a fraction of liquor at 140 proof before the alcohol content drops, making the order a logistical hurdle.

To meet the client’s expectations, the team needed to balance high alcohol content with the corn flavor the client loved. Column stills, which can boost proof, often strip away flavor—a nonstarter for this order. Instead, Mark proposed a novel solution: modifying their thump keg to mimic a column still’s effects without sacrificing taste. “If you took a worm like this and you took a thump keg… set that dude right down in there, put a little hole where you could run the cold water,” Mark explained. The idea was to create a double-chamber thump keg with eight cold water pipes to condense alcohol vapor, capturing high-proof liquor while preserving the corn’s character.

The team split tasks to tackle the challenge. Mark and Kelly focused on building the modified thump keg, designing it with two chambers and four pipes per chamber to maximize condensation. The vapor would pass through the cold pipes twice, theoretically yielding purer, higher-proof alcohol. However, the setup raised concerns about back pressure. “I tell you what worries me more than anything is… we put so much back pressure on the pot we blow the cap off,” Mark cautioned. To mitigate this, they added a drain to prevent liquid buildup in the thump keg, which could obstruct steam and cause a dangerous pressure surge.

Meanwhile, Digger and Beaz worked on fortifying the mash to boost its alcohol by volume (ABV). They increased the corn content for flavor and added extra sugar—nine pounds per 50 gallons instead of the usual six—to raise the mash’s ABV from 12–14% to 18–19%. “We got to do everything we can to stretch that 140-proof hole a little bit longer,” Digger said, emphasizing the need to maximize high-proof output. They also added a hefty dose of yeast—about a pound and a half—to kickstart fermentation quickly, ensuring the yeast converted as much sugar as possible into alcohol before cooling.

With the mash prepared and the thump keg ready, the team fired up the still, anxiously awaiting the results. “This whole thing is a new deal to us,” Mark admitted, wary of the potential for back pressure to disrupt the run. As the still heated, the first drops of liquor emerged, and the team watched closely. “It’s trying to spit a little, ain’t it?” Digger observed, hopeful as the liquor began to flow. The smell from the worm spout was promising, hinting that the corn flavor remained intact.

The moment of truth came with the proof test. Digger performed a “shake test,” noting the large, bright bubbles that disappeared quickly—a sign of high-proof liquor. Using a hydrometer, they measured the first batch at an impressive 168 proof, far exceeding the client’s 140-proof requirement. “Look at that, 168! Outstanding,” Digger exclaimed, elated at the success. While they would need to dilute the liquor slightly to hit 140 proof, the high starting point meant they could produce more of the desired product per run, inching closer to fulfilling the 100-gallon order.

The success of the modified thump keg and fortified mash marked a triumph for Mark and Digger, who had taken a gamble on an untested setup. “If it works like we think it do, everybody else will be trying to build one before you know it,” Mark said with a grin. The run proved they could deliver high-proof moonshine without sacrificing the corn flavor the client craved, securing a profitable deal and reinforcing their reputation as innovative moonshiners. For Mark and Digger, this high-stakes challenge was a testament to their ingenuity and determination to push the boundaries of their craft.