🥃 Why Distilleries Secretly Love This Black Whiskey Fungus

💥 Opening Pour

A few years ago I was walking past an old Kentucky rickhouse with my buddy Chuck, a retired master distiller.
The walls, the trees, even the road signs nearby were covered in a strange black coating.

I asked him if something had gone terribly wrong.

Chuck smiled and said, “Nope… that’s how you know the whiskey’s doing its job.”

📖 The Story

If you spend time around distilleries, you’ll eventually notice something odd.

Dark black streaks crawling across warehouses.
Black dust on nearby trees.
Even rooftops turning charcoal-colored.

At first glance, it looks like mold.

The kind of thing that would make a health inspector faint.

But in bourbon country, locals know better.

That strange black coating is called whiskey fungus.

Its proper name is Baudoinia compniacensis—a tiny organism that lives off alcohol vapor floating through the air.

And guess where that vapor comes from?

Aging barrels.

When whiskey rests inside oak barrels, the wood slowly breathes. Tiny amounts of alcohol escape through the staves.

Distillers call this loss the Angel’s Share—the portion of whiskey that evaporates during aging.

In hot climates like Kentucky, a barrel can lose 5–7% of its contents in the first year alone.

That alcohol drifts into the air around the rickhouses.

And the fungus?

Well… it eats it.

So the more barrels aging nearby, the more fungus grows.

That’s why you’ll see the black coating near distilleries across:

• Kentucky
• Scotland
• France’s Cognac region
• Caribbean rum warehouses

In fact, scientists first noticed it around Cognac cellars where brandy had been aging for centuries.

To the untrained eye, it looks alarming.

To a distiller?

It’s a quiet signal that thousands of barrels are patiently turning raw spirit into great whiskey.

In other words…

When you see whiskey fungus, you’re looking at the footprint of aging whiskey.

And that means somewhere nearby, barrels are breathing, angels are sipping, and time is doing its slow magic.

🥇 The Weekly Pour

Bottle: Toppling Goliath Bourbon Whiskey

Price: ~$45–$60
Proof: 96
Age: NAS (select aged barrels)

This week’s bottle came from a good buddy of mine who knows I’m always hunting for interesting pours.

He slid the bottle across the table and said,
“Try this one — it surprised me.”

He wasn’t wrong.

Toppling Goliath may not be the first name that pops up when people talk bourbon, but that first sip told me everything I needed to know.

Smooth. Sweet. Easy to enjoy.

The kind of bourbon that disappears from the glass faster than you expected.

Nose: Honey, vanilla bean, toasted oak, light citrus

Palate: Butterscotch, caramel corn, baking spice, soft rye warmth

Finish: Smooth and warming with lingering vanilla and gentle spice

✅ Smooth, approachable bourbon
✅ Sweet caramel and honey notes that shine neat
✅ A sleeper bottle many bourbon drinkers overlook

🛒 Availability → Limited regional release (Midwest & distillery shop)

🍹The Art of Mixing

The Rickhouse Buck

Bright, refreshing, and perfect for warm evenings.

Ingredients

• 2 oz Toppling Goliath Bourbon
• ¾ oz fresh lemon juice
• ½ oz honey syrup
• 3 oz ginger beer
• Lemon wheel

Instructions

1. Fill a tall glass with ice.

2. Add bourbon, lemon juice, and honey syrup.

3. Top with ginger beer and stir gently.

4. Garnish with a lemon wheel.

Tip: The ginger bite wakes up the bourbon’s spice while the honey softens the edges.

🍖 Flavor Pairing Picks

Pair it with:

🍗 Maple-glazed pork ribs — The bourbon’s caramel and honey notes echo the glaze beautifully.

🍑 Grilled peaches with vanilla ice cream — Sweet fruit and oak spice are a summer dream.

💨 Nicaraguan medium-bodied cigar — Earthy cocoa notes balance the bourbon’s sweetness.

🧠 Big Lesson of the Week

Great whiskey always leaves a mark.

It takes time.
It takes patience.
And yes… sometimes it even leaves a little fungus behind.

But that slow process is exactly what turns raw spirit into something worth savoring.

🥂 Final Toast

To the barrels that breathe, the angels who sip first, and the quiet magic happening inside every rickhouse.

🥃 Repeatable Proverb

If the barrels are breathing, the whiskey is living.

📖 The Whiskey Journal Is Here

For those of us who believe every bottle tells a story worth writing down.

I finally released The Art of the Pour Official Whiskey Tasting Journal—the same one I use to jot down:

🖋️ Tasting notes, barrel picks, and “finally cracked it open” moments
🗓️ First pours with friends
🧠 Thoughts that hit halfway through a good pour

🎁 And because I love a good surprise, I’m throwing in a free printable Whiskey Tasting Wheel—yep, the one folks keep asking about from past newsletters.

Already a subscriber? You’re first in line.
👉 Get the Journal + Free Whiskey Wheel

Now Its Your Turn

Have you ever noticed the black whiskey fungus near a distillery?

Reply and tell me:

• The best distillery you’ve visited
• The bottle you’re sipping lately
• Or the whiskey that surprised you most this year

I always enjoy hearing what’s in your glass.

Until the next pour… keep your glass heavy and your stories heavier.

Ethan “Neat” Whitmore

P.S. Next week: the strange law that forces bourbon makers to use brand-new barrels every time—and how it accidentally created a billion-dollar barrel industry. 🥃