Jefferson's Reserve Cask Strength Bourbon (2025) Review

Bourbon brands, like any other business, often make minute changes to their products to cater to the changing wants and needs of their customers. But in our industry, change is slow and the demands of enthusiasts today might mean we don’t get to see them for years. Instead of making a new whiskey from the ground up, there are things that producers can do in a short period of time to create new products that attract more sales. I’m talking about stuff like finishing whiskies in different barrels, blending together different mash bills or even creating a cask strength version where there previously wasn’t one.

One brand that keeps trying to give their customers new things has been Jefferson’s Reserve. It seemed like they were doing most of the things I just listed, but were still ignored by the hardcore enthusiasts for being too cutesy with their releases. Ever since they ran out of those really great stocks of age-stated Stitzel-Weller and Bernheim bourbon in the early 2000s, nothing seemed to really catch our eye. The entire industry saw that enthusiasts were clamoring for age statements and cask-strength whiskies and Jefferson’s refused to do both.

Jefferson’s Reserve Cask Strength Bourbon wasn’t the first

Jefferson’s Ocean may not have been the thing that we were asking for, but they did shake things up by intermittently releasing certain “Voyages” in cask strength form. I tried some and thought they were generally very well done, but still a little pricey for the age (which we were all assuming was around 5 years old). Then came “Tropics” which was like an offshoot of Ocean. The extra proof and longer aging (although they stopped short at telling us an exact age statement) was more intriguing, but the $100 MSRP kept many from purchasing it.

For those that did try both of these releases, it demonstrated that Jefferson’s was actually making good bourbon. But they still lacked an age-stated, cask strength bourbon. Finally, that day came in late in 2025 with the release of Jefferson’s Reserve Cask Strength Bourbon.

I’d love to tell you what the source(s) for their bourbon is, but the bottom line is we don’t know. I can tell you that over the last decade, Jefferson’s has sourced bourbon from Barton, Kentucky Artisan Distillers, Bardstown Bourbon Company (and by extension, probably Green River), Rabbit Hole (but their contract dictates they use ISC barrels, not Kelvin like RH typically uses) and strangely enough, Wild Turkey. And these are just the ones who have been uncovered, I imagine there could be one or two more on a limited basis.

I might not know the sources of bourbon that go into a typical blend of Jefferson’s, but my friend James captured this image above at a Jefferson’s tasting where they showed the actual blend for standard Jefferson’s. It looks like it’s a blend of two ryed bourbons and one wheated bourbon. By Trey Zoeller’s own account, the same blend used in regular Jefferson’s Reserve Very Old Very Small Batch bourbon is the blend used in their Cask Strength version. So while that still doesn’t tell us much, it does seem to indicate we’re drinking a four grain bourbon aged for at least 8 years. My guess is the wheated bourbon element is coming from Bardstown Bourbon Company, but the other two ryed bourbons are a bit more of a mystery to me.

So how is this bottle of Jefferson’s? Thanks to my friend Mike over at Mostly Peaceful Bourbon, I get to find out. I sampled it neat in a glencairn.

Tasting Notes

Nose: Scents of barrel char, wood and caramel lead the way while some fruit notes like berries and cherries add a nice layer behind it. I’m getting vanilla and a bit of chocolate (which is probably from the wheated bourbon) along with sweet notes like the candy “Bit-o’-Honey.”

Palate: There’s something about tasting some oak notes in a bottle of Jefferson’s that confuses my brain. It’s been so long since they’ve put out something with some age to it, that I’m just not used to it. But I like I what I’m tasting. Aside from that, I think that the rye notes and spice notes like cinnamon, allspice and star anise make themselves known with every sip. There’s a nice array of herbal flavors that contrast the sweet notes of caramel, flat Dr. Pepper and cherry licorice. Hopping on the candy train is Mike & Ikes. The best part out of all of this? The heat is pretty restrained on my tongue. This thing tastes maybe around 115 proof, tops.

Finish: Lingering notes of cinnamon, red fruits and raisins combine with toffee and caramel to keep the finish more on the sweet side. That’s not saying it’s without more mature notes, because I’m also able to detect oak and tobacco leaf long after the sip is complete. It’s very well-rounded.

Score: 7.8/10

Consider me shocked at how good this is. I would have never expected the balance and depth of flavor coming out of a bottle of Jefferson’s. It has truly opened my eyes. I have heard of many people referring to this as a “Stagg (Jr) Killer” and they’re not far off. Modern Stagg batches have been somewhat underwhelming and don’t have the breadth of flavors that Jefferson’s Cask Strength has, but it does have an intensity that this Jefferson’s seems a little light on (surprising given that it’s 130 proof).

I may have exposed another positive attribute of the Jefferson’s because the more I ponder what’s in my glass, the more I’m finding it drinking below its proof. Hell, I’d go as far as to say that this could be the perfect daily sipper as long as you’re not overdoing it. It would be very easy to get carried away with this one.

Final Thoughts

Jefferson’s Cask Strength isn’t the perfect bourbon, but at $60 a bottle, it doesn’t have to be. It’s got everything you’d want coupled with the fact it’s actually obtainable in most regions (let me know if your area hasn’t received distribution yet). There’s no way this bottle doesn’t make a majority of reviewer’s “Top XX Bottles of 2026” lists – it’s going to make mine for sure. I’m telling you now, this is a bottle you buy to share with your friends to see the expression on their face – and maybe their opinion of Jefferson’s itself – change. I know mine did.