Think of a mashbill as a whiskey’s recipe. It’s the specific mix of grains a distiller uses to begin the magical journey from humble cereal to the delicious spirit in your glass. This recipe is always detailed in percentages, outlining how much of each grain goes into the initial mixture. While distillers have their secret formulas, the process isn’t a free-for-all, especially with bourbon. By law, bourbon’s mashbill must contain at least 51% corn.

Definition

A mashbill is the grain recipe used to produce a whiskey. The most common grains found in American whiskey mashbills are corn, rye, malted barley, and wheat. For a bourbon to be called a bourbon, it must have at least 51% corn. The remaining 49% can be a combination of other grains, which is where distillers get creative. For example, a “wheated” bourbon swaps the traditional rye for wheat as the secondary grain. It’s important to note that distillers are not legally required to disclose their exact mashbills, which is why some recipes are closely guarded secrets.

Why does it matter?

The mashbill is the single most important factor in determining a whiskey’s flavor profile before it even touches a barrel. Each grain contributes its own distinct character. The high corn content required in bourbon provides a foundational sweetness. Rye introduces spicy notes, often described as pepper or baking spice. Wheat tends to create a softer, smoother, and sometimes sweeter profile. Malted barley is often used in smaller quantities, contributing biscuit, nutty, and chocolatey notes while also providing essential enzymes for the fermentation process. Understanding the mashbill helps you predict a bourbon’s taste and find spirits that match your preferences.

How OAKR helps

While knowing a mashbill gives you clues about a whiskey’s flavor, everyone’s palate is different. You might pick up on a spicy note that someone else misses. This is where OAKR simplifies your discovery process. Our bourbon sommelier app aggregates tasting data from blind tasting panelists, creating a comprehensive and reliable flavor profile for hundreds of spirits before you buy. OAKR does the heavy lifting, giving you detailed flavor insights and personalized recommendations. Explore the app to find bourbons with flavor profiles tailored just for you, filter by the flavors you want and even mashbill ingredients.