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We chase the real engine of whiskey flavor by breaking down fermentation from mash temperatures and enzymes to yeast behavior and the distiller’s beer that feeds the still. Then we pivot from science to the glass with a George Dickel 15-year Tennessee whiskey single barrel review, including how charcoal mellowing shapes what we taste.
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• grain-to-sugar basics, starch conversion, mash temperature control
• alpha amylase and beta amylase, why enzymes matter for fermentable sugars
• yeast fermentation, alcohol plus CO2 plus heat plus flavor compounds
• why distillers guard yeast strains and monitor pH, oxygen, contamination
• fermentation’s link to ethanol fuel, rockets, aviation, and modern biofuels
• Lincoln County Process explained, charcoal mellowing as subtractive filtering
• George Dickel 15 OHLQ single barrel breakdown, nose-body-taste-finish score
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Fermentation is the step most whiskey fans skip past and it might be the step that decides everything. We walk through the bourbon fermentation process from the moment cereal grains hit hot water to the moment yeast turns sugar into alcohol, heat, and the flavor compounds you later call cherry, spice, fruit, or funk. If you’ve ever wondered why mash temperature matters, what enzymes like alpha amylase and beta amylase actually do, or why distillers treat yeast strains like treasure, we lay it out in plain language with a real-world distiller mindset.

Then we take a sharp turn into a wild connection: the same fermentation science that builds whiskey also shows up in fuel history and modern biofuel research. Ethanol has powered more than good times, and seeing “grain, sugar, yeast, energy” as biology plus engineering makes the whole craft feel bigger than a barrel warehouse. We also talk about why fermentation can be the most underestimated stage of distilling, even when everyone loves to debate aging, maturation, and wood.

To bring it back to the glass, we run a full barrel bottle breakdown of a George Dickel 15-year Tennessee whiskey single barrel (OHLQ selection). We cover the Lincoln County Process, charcoal mellowing, and how filtration plus age can deliver a gorgeous nose but a more muted, char-forward palate and finish. If you like detailed tasting notes and honest scoring, you’ll get plenty to react to.

Subscribe wherever you listen, share this with a whiskey friend who loves the “why,” and leave us a review with your take: can you taste fermentation character in a finished whiskey?

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We hand Watershed the keys and let Ryan Venrick run our first distillery-led blind tasting, and we learn fast that we’re not as good at guessing as we think. The reveals turn into a real lesson on slow water reduction, finishing choices, and how Watershed is reshaping Ohio bourbon from the barrel up.
• Ryan’s career path from bottling line to blending and barrel management
• Why Watershed’s bourbon portfolio changed after the mash bill shift
• Blind tasting format and why pairing samples exposes process differences
• Apple brandy finish side-by-side with crash dilution vs slow reduction
• How slow water reduction affects mouthfeel, perceived proof, and flavor
• Bottled-in-bond vs toasted bourbon and what “toasted” is meant to add
• Uncut Unfiltered Batch 7 reveal and why proof placement matters in tastings
• Nochino finished bourbon and the labor of harvesting unripe walnuts
• The elevage program and why only a small number of distilleries do it
• Watershed closing the restaurant and building new on-site experiences
• What’s coming next: OHLQ single barrels, fall finishes, maple finale, Japan tease
• Blending philosophy: start with a base then shape with “one trick pony” barrels
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Crash dilute or slow reduce, can you actually taste the difference? We bring on Ryan from Watershed and hand him full control of a five-pour blind tasting built to show where Watershed has been and where their bourbon is headed. The curveball: two glasses are the exact same apple brandy finished whiskey at the exact same proof, but diluted two different ways. Once you hear what’s happening in those barrels, you’ll never think about proofing water the same way again.

From there we work through the lineup and put names to what our palates are telling us: a core Bottled-in-Bond, a limited toasted bourbon done with a short, targeted finish, and a final punchy reveal that lands at 123 proof with Uncut Unfiltered Batch 7. Along the way we get into the real “why” behind mouthfeel, perceived heat, oak extraction, and how slow water reduction can preserve flavor compounds and create a more cohesive pour. If you love blind tastings, barrel finishes, and nerdy whiskey process talk that stays practical, this one delivers.

We also zoom out to the bigger story of Ohio whiskey. Ryan shares how Watershed is building an elevage-style program, why scaling techniques like slow reduction is hard, and what’s next as they invest in better visitor experiences like a blending class and a bottle-your-own option. We talk upcoming OHLQ single barrels, the fall finishing series, and why the maple finish is designed for balance, not syrup.

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We cross borders for a Cinco de Mayo pour that rewrites what whiskey can be when the grain, the place, and the people drive the process. With Sierra Norte’s Doug French, importer Bob Murphy, and our Whiskey Doctor Randy Ford, we dig into rainbow corn whiskey, heritage agriculture, and how Oaxaca shapes flavor from seed to barrel.
• why Sierra Norte moves from mezcal into 100% corn whiskey as a way to use and protect native Oaxacan corn
• how reviving endangered corn varieties supports farmers, creates local jobs, and builds community pride
• what “rainbow corn” means and why different corn colours create distinct whiskey flavour profiles
• Oaxaca farming realities, rainy-season growing, drought risk, and traditional corn-beans-squash planting
• pot still distillation, open-air fermentation with wild yeast, and why slow distilling keeps grain character
• barrel strategy with used French oak wine barrels, re-charring, and managing accelerated aging in warm climates
• how Mexican whiskey fits into a crowded US market and a Mexico market that still leans toward tequila, mezcal, and Scotch
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Mexico doesn’t just make tequila and mezcal. We sit down with Doug French of Sierra Norte in Oaxaca, plus importer and distributor Bob Murphy and our own Whiskey Doctor Randy Ford, to unpack a whiskey story built on native corn, hard farming realities, and a distilling philosophy that keeps the grain doing the talking. If you’ve ever assumed “real whiskey” starts and ends in Kentucky, this one challenges that fast.

We get into what makes Sierra Norte’s corn whiskeys so distinctive: single-varietal expressions made from different colours of native corn, plus the wild-sounding “rainbow corn whiskey” created from multicoloured kernels that can’t be cleanly sorted. Along the way we talk terroir in plain terms: Oaxaca’s water scarcity, rainy-season growing, drought risk, and the traditional corn-beans-squash approach that helps fields stay productive. The bigger takeaway is that heritage agriculture and craft spirits can reinforce each other when the market rewards farmers for keeping rare seeds alive.

Then we go inside the build: pot still distillation, open-air fermentation with natural yeast, and aging choices designed for balance rather than heavy wood. Doug explains how used French oak wine barrels, re-charring, and careful barrel management can shape a corn-forward whiskey in a warmer climate where aging can move faster. We also touch the business side of world whiskey, from the oversupplied US market to why whiskey remains a smaller category inside Mexico, and how distribution and online shipping help niche bottles find the right drinkers.

If you’re curious about Mexican whiskey, corn varietals, and what “Whiskey Without Borders” really tastes like, press play, share this with a whiskey friend, and leave us a review so more people can find the show.

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