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Texas bourbon tends to stir strong opinions among enthusiasts. For proof, just check out my recent review on Garrison Bros Cowboy Bourbon on Reddit. I mentioned that it’s often young, but that doesn’t mean it can’t defy expectations in taste. Treaty Oak’s Single Barrel Ghost Hill Bourbon embodies much of the same: youthful on paper, but more complex than you’d expect due to the climate it’s been aged in. Let’s explore what makes this particular Texas bourbon different.
History and Distillery Overview
Treaty Oak Distilling was founded in 2006 by Daniel Barnes; a West Texas native and former sommelier. He started the distillery just outside Austin and named it after the historic Treaty Oak tree. Initially he started with modest equipment and ambitions but quickly scaled up to copper Vendome pot stills that replaced his smaller setups (I think one of these small stills sets abandoned outside of the aging warehouse). Eventually he added a column still to achieve consistency.
As the distillery grew, so did its campus. I just visited them for the first time at the beginning of July and experienced first hand that Ghost Hill Ranch is a complete destination with a restaurant, gift shop, playground, tasting bar, and live music venue. It was the perfect blend of working distillery and Texas hospitality. If you’re in the area, you should go there at least once.
Not everything Treaty Oak releases has been their own distillate. They’ve sourced plenty of whiskey but have always clearly marked it under names like “Schenley Reserve” or their “Red Handed” series. I think this went a long way to gaining the trust of enthusiasts while highlighting their dedication to their own distillation and aging methods.
About the Whiskey
Like many Texas distilleries, Treaty Oak has embraced a wheated bourbon mash bill as their standard recipe. Why do so many Texas distilleries use wheated mash bills you ask? The answer I most often get is because ryed bourbon mash bills impart too much spice during the maturation process due to the high heat. Whether or not that’s true is up for debate, but the fact is that a lot of distillers in the region do this.
Ghost Hill Texas Bourbon’s wheated mash bill is made up of 57% Texas-grown corn, 32% Texas-grown wheat, and 11% malted barley. The distillery emphasizes that local sourcing isn’t mere marketing—it profoundly shapes the bourbon’s flavor profile. The unique Texas climate significantly accelerates the aging process with intense heat and rapid temperature fluctuations creating deeper interaction with the oak. Consequently. Even barrels aged just over three years carry richer, more developed characteristics and usually have a fair amount of oak tannins in the final product.
I wasn’t told the exact barrel entry proof that Treaty Oak uses for their bourbon, but my guess is it’s lower than the industry norm of 125. While walking around the place, I noticed some markings on various Kelvin Cooperage barrels ranging from 111 to 116 proof. Maybe those markings were just the barrel proof at the time it was tested but maybe it was what the distillate went into the barrel at. This would make sense if it went in around that proof because otherwise Treaty Oak would be getting a ton of high-proof barrels from their warehouse.
Speaking of warehouse, I noticed that Treaty Oak has two areas they mature their barrels. The first is a metal-clad warehouse behind their distillery building. It has no windows, but it does have an overhead garage door on the front and back of it. I managed to snap a picture of the inside which shows a mixture of palletized and “ricked” barrels.
Behind the warehouse sets four 40′ long shipping containers that are undoubtedly storing barrels in them (the black fungus growing on the outside is a dead giveaway). Treaty Oak is not the first company to mature whiskey in a shipping container and they won’t be the last. The practice is actually more widespread than you’d think as I wrote about here.
Ghost Hill Single Barrel (#1518) Texas Bourbon
The bottle I’m reviewing today was being sold at the gift shop/tasting room when I visited the distillery. It is labeled as a 5-year-old single barrel bourbon that was bottled at 108.4 proof. Honestly, I’m surprised the proof was so low for being cask strength. I wasn’t sure what to expect seeing as how I’ve never had anything of theirs before, so I let curiosity get the best of me. How was it? Let’s find out. I sampled this neat in a glencairn.
Tasting Notes
Nose: Sweet notes of brownies topped with caramel sauce and butterscotch chips. Tannic notes like cigar wrapper and oak are prevalent, but so are hints of cardboard from time to time (typically a note I find in younger whiskey). Cinnamon graham crackers with vanilla marshmallow keep the good scents coming and it even gets a little fruit boost with some citrus meringue pie. Overall, I’m really digging the nose!
Palate: Big, oily and sweet-heat driven. There is dichotomy of flavors going on in my mouth with some astringent notes and char accompanying sweeter notes like burnt toffee, vanilla flan and sweet kettle corn. I am finding a hint of marzipan and chocolate chip cookies. The graham cracker theme continues from the nose. The citrus notes I found on the nose turn into more of a bitter orange peel which isn’t as bad as it sounds, but I’d prefer it without the bitterness. Softer tannin notes come forward a few sips into the session with leather and cacao nibs. For only 108 proof, this is a remarkably rich and thick bourbon.
Finish: Long and smoldering. Caramel and vanilla linger while tannic oak cigar wrapper, barrel char and dried cherry slowly fade. There is a small amount of smokiness to the finish (not in a Scotchy way) that I often find with whiskey aged in hot climates. It’s interesting and fun.
Score: 7/10
I came away from my experience with this bottle more impressed than I thought I’d be. Honestly, I’ve not been blown away by much of what I’ve tried from Texas, but this was one captivating bourbon. While it’s still a bit rough around the edges, it shows a lot of potential to be something better as they develop their processes more. Plus, I think the packaging is pretty cool and doesn’t try to copy off of anyone else. It’s always good to stand out.
Final Thoughts
Treaty Oak’s single barrel program shows what their wheated mash bill is capable of. Yes, it’s young on paper, but the barrel and climate add heft – tannins, char, and darker sweets – that suggest far more maturity. If you’re chasing nuance over novelty, this bottle of Ghost Hill still delivers. So what’s the catch? You’ll probably have to do some legwork to get a bottle. I know that it’s not available in Indiana and judging by the size of their warehouse, it probably doesn’t have super-wide availability – especially for the cask strength single barrels. Still, for Texas craft bourbon with a cool backstory and locale, this is a buy for me.