⭐ Sour Cream (Best Nut-Free Option)
1:1 (1 cup sour cream per 1 cup Greek yogurt)Sour cream has a similar fat content and acidity level as Greek yogurt, which helps maintain the doughnut’s tender crumb and slight tang. The acidity also reacts with baking soda or powder to provide proper leavening.
When substituting, ensure sour cream is well mixed to avoid lumps. Because sour cream is slightly less thick, you might want to reduce any added liquid slightly to maintain batter consistency.
The final doughnuts will have a very similar texture and flavor to those made with Greek yogurt, with a subtle richness and balanced acidity that enhances the overall taste.