Preheat your oven to 300°F / 150°C and line a large baking sheet with parchment paper.
Separate the egg whites from the yolks into two separate bowls. To the egg whites, add the cream of tartar and beat with an electric mixer on high speed until stiff, glossy peaks form.
In the second bowl, combine the egg yolks, softened cream cheese, and a pinch of salt.
Beat with the mixer until the mixture is completely smooth and creamy.
Gently fold the egg white mixture into the egg yolk mixture in thirds. Be careful not to overmix or stir, as this will deflate the batter. The goal is to keep it light and airy.
Spoon six even mounds of the batter onto your prepared baking sheet, shaping them into bun-like circles about 4 inches in diameter.
Bake for 25-30 minutes, or until they are golden brown and firm to the touch.
Let them cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.