Step-by-Step Directions
Step 1: Preheat the Oven
Preheat your oven to 320°F (160°C). Line the bottom and sides of an 8-inch cake pan with parchment paper. Prepare a large baking pan for a water bath by filling it with hot water.
Step 2: Melt the Cream Cheese and Butter
In a heatproof bowl, combine the softened cream cheese, butter, and milk. Place the bowl over a pot of simmering water, stirring until smooth and fully combined. Let it cool slightly.
Step 3: Mix the Egg Yolks
In a large bowl, add the egg yolks, then whisk in the lemon juice and vanilla extract. Gradually add the cooled cream cheese mixture to the egg yolks and whisk until well-blended.
Step 4: Sift in the Dry Ingredients
Sift the cake flour, cornstarch, and a pinch of salt into the egg yolk mixture. Fold the mixture gently until smooth.
Step 5: Beat the Egg Whites
In a separate clean bowl, beat the egg whites with an electric mixer on medium speed until frothy. Gradually add the sugar, beating until stiff peaks form.
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