Greek Yogurt (Best Option)
1/4 cup Greek yogurt per 1/4 cup sour creamGreek yogurt has a similar fat content and tangy flavor to sour cream, making it an excellent substitute in risotto. Its protein content helps maintain creaminess without breaking down under gentle heat.
To prevent curdling, stir Greek yogurt in off the heat or at very low heat just before serving. Avoid boiling after adding.
The final risotto will have a slightly more pronounced tang but maintain the desired creamy texture, closely mimicking sour cream's contribution.