Good substitutes for sour cream are low-fat or nonfat yogurt and cottage cheese, although nonfat yogurt should only be used as a substitute in sweet dishes. Plain yogurt is a popular substitute for sour cream, as it has a similar taste and consistency. Swapping sour cream for yogurt is simple, as people use the same amount of yogurt in a recipe as sour cream.
Yogurt substitutes well for sour cream in many dishes, including salads, dips, appetizers and desserts. Although they are very similar, people may need to make some adjustments when using yogurt. Whole-milk Greek style yogurt is thick, and may necessitate more liquid. Plain yogurt, which is more watery, may need to be strained before use to remove excess water.