What is finishing?

The Art of Finishing in Whisky Making

In the world of whisky, the term finishing refers to a final, transformative step in the maturation process—one that adds complexity, character, and nuance to the spirit. While traditional whisky aging takes place in oak barrels, finishing involves transferring the whisky to a different type of cask for a secondary maturation period. This practice has become a hallmark of innovation in modern whisky making, allowing distillers to experiment with flavor and aroma in exciting ways.

After a whisky has matured in its primary cask—often American oak barrels that previously held bourbon—it may be moved to a secondary cask that once contained another type of liquid, such as sherry, port, rum, wine, or even beer. This secondary cask imparts additional flavors and aromas to the whisky, enhancing its profile without overpowering the original character.

The finishing period can range from a few months to several years, depending on the desired outcome. The goal is to strike a balance: to enrich the whisky with new dimensions while preserving the integrity of the base spirit.

Finishing allows distillers to:

• Add complexity: Different casks contribute unique notes—sherry casks might bring dried fruit and spice, while rum casks can add tropical sweetness.

• Differentiate products: Finishing helps brands create limited editions or special releases that stand out in a crowded market.

• Revive tradition with innovation: While finishing is a relatively modern trend, it draws on centuries-old practices of reusing barrels, blending old-world craftsmanship with new-world creativity.

Popular Types of Finishing Casks

1. Sherry Casks: Perhaps the most traditional finishing cask, especially in Scotch whisky. These casks add rich, fruity, and nutty flavors.

2. Port Casks: Known for imparting berry sweetness and a velvety texture.

3. Rum Casks: Add tropical fruit, molasses, and spice notes.

4. Wine Casks: Red wine casks can bring tannins and dark fruit, while white wine casks may add citrus and floral elements.

5. Beer Casks: An experimental choice, often used to create bold, hoppy, or malty finishes.

Notable Examples

Whiskies like Glenmorangie’s Lasanta (sherry cask finish) or Balvenie’s Caribbean Cask (rum finish) have become iconic examples of how finishing can elevate a whisky’s profile. These expressions are often celebrated for their depth and drinkability, appealing to both connoisseurs and newcomers alike.

Final Thoughts

Finishing is more than just a marketing gimmick—it's a genuine craft that requires skill, patience, and a deep understanding of flavor. When done well, it can turn a good whisky into a great one, offering drinkers a richer, more layered experience. As whisky makers continue to push boundaries, finishing remains one of the most exciting frontiers in the spirit’s evolution.