Sour Cream (Best Option)
1:1 (1 cup sour cream per 1 cup cream cheese)Sour cream has a similar fat content and acidity level to cream cheese, which helps maintain the creamy texture and slightly tangy flavor desired in beef stew. The lactic acid in sour cream complements the savory beef, enhancing overall flavor complexity.
To avoid curdling, add sour cream towards the end of cooking and stir gently off the heat or on very low heat. Avoid boiling after adding sour cream.
The final stew will have a slightly lighter tang compared to cream cheese but will maintain a rich and creamy mouthfeel, making it a very close substitute.