Greek Yogurt (Best Option)
1:1 (1 cup Greek yogurt per 1 cup sour cream)Greek yogurt works well because it has a comparable fat content and acidity to sour cream, which helps activate baking soda or baking powder in waffle batter, resulting in a light and fluffy texture. The creamy consistency also ensures moisture retention.
For best results, use full-fat Greek yogurt to match the richness of sour cream. Avoid overly thick varieties by thinning slightly with a teaspoon of milk if needed to maintain batter consistency.
Compared to sour cream, Greek yogurt may impart a slightly more pronounced tang but generally produces waffles with very similar tenderness and flavor profiles.