Inside Maker’s Mark: Dr. Blake Layfield on Heritage Yeast, High-Barley Bourbon, and the Star Hill Farm 2026 Release

How does a legendary Kentucky bourbon brand innovate without losing its soul? Yesterday, we visited the Beam Suntory London office on Titchfield Street to sit down with Dr. Blake Layfield, the Master Distiller for Maker’s Mark and Star Hill Farm.

In an exclusive tasting and interview, Dr. Layfield pulled back the curtain on the unique production methods behind Maker's Mark bourbon, the distillery's strict adherence to heritage craftsmanship, and their latest agricultural breakthrough: The Star Hill Farm 2026 Release American Wheat Whisky.

The Maker’s Mark Production Process: Fact-Checking the Bourbon Legend

To understand the future of the brand, you have to understand the rigid, flavour-first rules established by founders Bill and Margie Samuels. We fact-checked the core tenets of the Maker's Mark distillery process with Dr. Layfield to see what sets this wheated bourbon apart from traditional Kentucky whiskeys.

1. Baking Bread to Create a Wheated Mash Bill

When Bill Samuels Sr. sought a smoother bourbon recipe in 1953, he famously burned the 170-year-old family recipe. To sample grain combinations without waiting years for aging, he baked them into loaves of bread. The winning loaf substituted traditional rye with soft red winter wheat, creating the signature front-of-the-palate sweetness that defines Maker’s Mark today.

2. High Malted Barley Ratio (14% Mash Bill)

While many Kentucky bourbon distilleries utilise a low malted barley content of around 5% to 10%, Maker's Mark uses 14% malted barley in its standard mash bill. This high percentage provides natural enzymes for starch conversion during mashing and contributes to a richer, creamier mouthfeel.

3. Limestone Spring-Fed Water and Proprietary Heritage Yeast

The distillery, located at Star Hill Farm in Loretto, Kentucky, relies on a 10-acre, spring-fed, limestone-filtered lake. This iron-free water is combined with a proprietary heritage yeast strain propagated since the 1950s. This specific wild yeast strain produces the distinct, vibrant citrus and cherry-esque top notes found in the distillate.

4. Low Barrel Entry Proof (110 Proof)

Under United States and Kentucky law, the maximum allowable barrel entry proof for bourbon is 125 proof. However, Maker’s Mark intentionally dilutes its new-make spirit down to 110 proof before it enters the charred white oak barrels. While this requires more barrels and increases production costs, it extracts fewer bitter wood tannins, yielding a smoother final whiskey.

5. Hand-Cut Labels and Iconic Red Wax Dipping

Every bottle of Maker's Mark is a testament to manual craftsmanship. The labels are still hand-cut on-site using a vintage 1930s mechanical printing press, and every single bottle is hand-dipped into the famous red wax at the Loretto bottling line.

The Evolution of Star Hill Farm: From Bourbon to American Wheat Whisky

Around 2016, the American whiskey category faced massive consumer demand for rye whiskey. Internal pressures mounted for Maker’s Mark to release a rye expression. However, true to their identity, the distillery refused to compromise on their signature grain profile.

Instead of pivoting to rye, they established Star Hill Farm as an agricultural research hub to explore the absolute limits of wheat flavour diversity. By completely removing corn—the legal baseline grain required to make bourbon—they created an entirely new category of American wheat whisky.

Tasting Notes & Review: The Star Hill Farm 2026 Release

The ultimate realisation of this grain-diversity initiative is The Star Hill Farm 2026 Release. This limited-edition, award-winning expression is a complex blend of three distinct wheat varieties, showcasing the profound impact of regenerative agriculture on whiskey flavour.

Unlike previous limited editions, the 2026 expression expands its grain bill to include soft red winter wheat, hard white wheat, and an heirloom hard red wheat.

Technical Specifications and Mash Bill:

• Category: American Wheat Whisky (Limited Release)

• ABV / Proof: 58.2% ABV (Cask Strength)

• Age: A curated blend of whiskies aged between 7 and 8 years old.

• Mash Bill Formulation: Blended from two distinct mash bills: One is 100% malted wheat, and the second is a combination of 70% unmalted wheat and 30% malted barley.

Flavour and Aroma Profile:

The 2026 iteration delivers a much darker, denser, and more concentrated profile than previous Star Hill Farm expressions.

• Nose & Palate: Rich molasses, stewed fig, zesty citrus, and ripe pear, layered over a buttery shortbread mid-palate.

• Finish: A long, velvety finish accented by soft cinnamon spice.

Sustainability and Regenerative Agriculture:

In step with modern sustainable distilling, 100% of the wheat used in the 2026 Release is sourced locally from partner farms within a 30-mile radius of the Loretto distillery. Every partner grower is strictly certified in regenerative agriculture practices, ensuring soil health, biodiversity, and carbon reduction are baked directly into the bottle.

The Future of Sustainable Distilling

Meeting with Dr. Blake Layfield highlights how the Beam Suntory portfolio is balancing historic bourbon legacy with forward-thinking liquid innovation. The Star Hill Farm 2026 Release proves that eliminating corn and focusing heavily on certified sustainable heirloom wheat can yield a world-class, cask-strength American whiskey. Whether you are a fan of classic wheated bourbon or high-proof innovation, this 2026 limited release is a milestone bottle for collectors and enthusiasts alike.