Mascarpone Cheese (Best Option)
1:1 by volumeMascarpone cheese is a rich, creamy Italian cheese with a fat content similar to Greek yogurt, which helps maintain the Panna Cotta's structure and mouthfeel. Its mild tanginess closely mimics the flavor profile of Greek yogurt without introducing excess acidity.
When substituting, ensure mascarpone is softened to room temperature for easy incorporation and to avoid lumps. Because mascarpone is richer, you might want to slightly reduce added sugar to balance sweetness.
The final Panna Cotta will be slightly richer and creamier than with Greek yogurt but will retain the desired firmness and smoothness, making it an excellent substitute.