Michter’s Barrel Strength Sour Mash Whiskey Review (2026)

By Richard Thomas

Rating: B+

When I learned that Michter’s was releasing a cask strength version of their US*1 Sour Mash Whiskey, two thoughts simultaneously entered my head. One was “at last!” The other was “they will soon run out of new variants to introduce.” The two thoughts are intertwined.

Michter’s core line up consists of four expressions: a bourbon, a rye, their Sour Mash Whiskey and a bottle labeled American Whiskey. The latter is a legacy expression, dating back to the preceding version of the Michter’s brand that was made at the Bomberger’s Distillery in Pennsylvania, rather than the current distillery in the Louisville suburb of Shively. Although the whiskey is made using the sour mash process, whereby some of the previous batch of mash is held back to temper the chemistry of the next batch, that is not why the whiskey is so named. Instead, it is believed that both versions of Michter’s Sour Mash are made with a grain recipe that has no dominant grain type, in the way that bourbon is 51%-plus corn or rye is 51%-plus rye grain. The exact mash bill for either version is unconfirmed.

Several years ago, Michter’s started their cask strength and also their toasted barrel finish lines, starting the cask strength off with their rye and the latter, toasted barrel with their bourbon. There were also 10 year old, single barrel versions of the rye and the bourbon. The toasted barrel line was extended to embrace both the rye and the Sour Mash; now the cask strength has finally been extended to include all three as well.

My thought about running out of new expressions is that although US*1 Unblended American Whiskey has been, so far, left out of these brand extensions, the only thing left to do with Sour Mash is give us a single barrel, 10 year old version.

The Whiskey
The cask strength versions of Michter’s come in at a relatively low proof compared to some other Kentucky bottlings, due to Michter’s low barrel entry proof. Whereas many cask strength expressions coming from Kentucky, such as Booker’s or Elijah Craig Barrel Proof, clock over 60% ABV, Michter’s Barrel Strength Sour Mash is just 111.5 proof (55.75% ABV). Michter’s uses a 103 barrel entry proof, which is quite low compared to the industry standard of 125 proof. My guess is Michter’s would need an especially wild take on maturation to bring their stuff to above 120 proof, let alone to produce a Hazmat whiskey.

This pour takes on a middle amber look in the glass. The scent leads with deep caramel, which moderates the dusting of ground clove, cinnamon and ginger that follows it. Add to that a modest, fruit cocktail syrup note in the background. The palate would have a silken mouthfeel to it, but the spicy current prevalent in Michter’s Sour Mash expressions tends to rub that feeling out for the most part. The flavor is oaky and peppery, with additional spices coming from that same blend of clove, ginger and cinnamon. Add a touch of vanilla and a little cocktail cherry fruitiness and you’ve got the main body. Tea tannins arise on the back end. The finish rolls out with a lightly applied trio: fruit, char and oak.

If you like US*1 Sour Mash, which is 86 proof, you’ll like this weightier, ballsier version of it even more.

The Price
Officially, this should cost $120 for a 750ml bottle. Michter’s is somewhat different from most other companies out there, though, in that they adjust their MSRP to reflect what the market will bear. So, for example, the price of Michter’s 10 Year Old bourbon or rye has risen to approximate what retailers ask consumers to pay, rather than remaining artificially low. So, one should expect to actually pay $120, more or less, to pick up a bottle of Barrel Strength Sour Mash.