INGREDIENTS
•
6 egg yolks at room temperature
•
3 egg whites at room temperature
•
1 cup (8 oz, 230g) sour cream at room temperature, divided in 1/2
•
1 tablespoon vanilla extract
•
2 cups (10oz, 285g) cake flour
•
1 1/2 cups (9 oz + 3 oz, 255g + 85g) granulated sugar, separated
•
3/4 teaspoon baking powder
•
3/4 teaspoon salt
•
1/2 teaspoon baking soda
•
2 sticks + 2 tablespoons (9 oz, 255g) unsalted butter at room temperature