Choose your substitute based on the dish type and desired flavor match. Consider whether you need a dairy-free or vegan option and how rich you want the final cheesecake to be.
Prepare the substitute as directed: drain sour cream, ricotta, or Greek yogurt through cheesecloth for 20 to 30 minutes; blend ricotta or silken tofu until completely smooth before use.
Apply the substitution ratio carefully. Use each substitute at a 1:1 ratio by volume, adjusting sugar for mascarpone and adding lemon juice or cornstarch where noted.
Taste and adjust seasoning. Add lemon juice for tang where needed, reduce sugar if using mascarpone, and check filling consistency before baking to avoid cracking.