Preheat oven to 300°F and line a springform pan with parchment paper.
In a mixing bowl, whisk together the egg yolks, cream cheese, sour cream, erythritol, and vanilla extract until the mixture is smooth and creamy.
In a separate bowl, beat the egg whites and cream of tartar until stiff peaks form. This will give your cake that lovely airy texture!
Gently fold the beaten egg whites into the yolk mixture. Be careful not to deflate those fluffy whites!
Pour the combined batter into the prepared baking pan, smoothing it out evenly with a spatula.
Bake for 25-30 minutes or until the top turns a beautiful light golden color.
Let the cake cool before slicing. Can be topped with whipped cream and fruit! 🍰✨
