Preheat the oven to 425F and line one eigh-inch pan with two pieces of parchment paper, making sure the pan is completely lined and the paper is hanging about two-inches above the pan.Alternately use a lightly greased springform pan Mix the sugar, flour, and salt in a medium bowl. In a separate measuring cup, mix the eggs, egg yolks, and vanilla extract.
Using the paddle attachment, beat the cream cheese for about 30 seconds.
Add the sour cream and mix until fully incorporated. Use a rubber spatula to scrape the bottom and sides of the bowl.
With the mixer on low speed, gradually add the sugar.
Still on low speed, gradually as the beaten eggs mixture.
Use a rubber spatula to scrape the sides and bottom of the bowl.
Pour the batter into the prepared pan and bake for 38-42 minutes over the second lower oven rack.The cake is ready when the edges are set, and the cake giggles when you slightly shake the pan, Remove the cake from the oven and let it cool completely before refrigerating or inverting to a serving dish.