La Calavera Regression is a dark sour ale from the Catalan brewery La Calavera, based in Ripollès. Brewed with smoked malt and wild yeast, this beer matures in wooden barrels previously used for whisky, imparting oak and spirit character to the finished beer. The interplay of smoke, wild fermentation acidity, and barrel influence creates a layered, unconventional sour.

At 8% ABV, Regression delivers warmth and complexity. La Calavera's approach blends classical ale fermentation with farmhouse sensibilities, resulting in a beer that respects tradition while pursuing its own character.