Greek Yogurt (Best Option)
1 cup Greek yogurt per 1 cup cream cheeseGreek yogurt works well because it has a thick, creamy consistency and a tangy flavor profile close to cream cheese, which helps maintain the cake's moisture and subtle acidity. The protein content also contributes to structure.
When substituting, drain any excess whey to avoid thinning the batter. Use full-fat Greek yogurt to prevent a dry crumb. Mix gently to maintain the yogurt's creaminess.
The final cake will be slightly lighter and less dense than with cream cheese but will retain moistness and a pleasant tang, enhancing the vanilla flavor without overpowering it.