Greek Yogurt (Best Option)
1:1 (1 cup Greek yogurt per 1 cup sour cream)Greek yogurt works well because it shares a similar protein and fat structure with sour cream, allowing it to emulsify and create a creamy texture in salad dressings. The natural lactic acid bacteria in yogurt provide the tanginess that sour cream contributes.
For best results, use full-fat Greek yogurt to match the richness of sour cream. If the dressing is too thick, thin it with a small amount of water, lemon juice, or vinegar to achieve the desired consistency.
The final dressing will be slightly tangier and may have a thicker mouthfeel, but overall it will closely replicate the flavor and texture of sour cream-based dressings.