Sour Cream (Best Option)
1/4 cup sour cream per 1/4 cup Greek yogurtSour cream is fermented dairy like Greek yogurt, sharing similar acidity and creamy texture, which helps tenderize meat and balance the stew's richness. The lactic acid in sour cream also aids in flavor development during cooking.
When adding sour cream, stir it in gently at the end of cooking to prevent curdling. Avoid boiling after addition to maintain smoothness.
The final stew will have a comparable tang and creaminess, with a slightly softer texture than Greek yogurt but still very close in flavor profile.