Greek Yogurt (Best Option)
1:1 (1 cup Greek yogurt per 1 cup sour cream)Greek yogurt has a similar protein and fat content to sour cream, providing the creamy texture and tanginess essential for bread pudding custard. The acidity helps balance the sweetness and aids in tenderizing the soaked bread.
To ensure smooth integration, whisk the Greek yogurt well before adding to the custard mixture. Avoid low-fat versions as they can cause curdling or a grainy texture.
Compared to sour cream, Greek yogurt yields a slightly denser pudding with a mild tang, maintaining the characteristic moistness and flavor complexity of the original recipe.