Sour Cream (Best Option)
1:1 by volumeSour cream has a similar fat content and acidity level to Greek yogurt, which helps in tenderizing the gluten network and enhancing fermentation activity in focaccia dough. The lactic acid bacteria in sour cream also contribute to the characteristic tangy flavor.
When substituting, ensure the sour cream is full-fat and stirred well to achieve a smooth consistency. Avoid low-fat or whipped varieties as they can alter hydration and texture.
The final focaccia will have a comparable crumb structure and flavor profile, with a slight variation in tanginess depending on the sour cream brand.