Sour Cream (Best Option)
1:1 (use equal volume)Sour cream closely mimics the acidity and moisture content of Greek yogurt, which helps to tenderize the gluten in the batter and activate leavening agents if present. This results in crepes that are soft and pliable.
When substituting, use the same volume as Greek yogurt. Ensure the sour cream is well mixed to avoid lumps in the batter. Because sour cream is slightly less thick, you may need to adjust the flour slightly if the batter feels too loose.
The final crepes will have a comparable texture and flavor, with a subtle tang that enhances the overall taste, making sour cream the most reliable substitute.