Favorite White Layer Cake

INGREDIENTS

and 1/2 cups (250g) sifted cake flour1 (measured correctly)

2 tsp

baking powder

1/2 tsp

baking soda

1 tsp

salt

3/4 cup

(1.5 sticks; 170g) unsalted butter, softened to room temperature

and 3/4 cups (350g) granulated sugar

large egg whites, at room temperature

1/2 cup

sour cream, at room temperature2

1 tbsp

pure vanilla extract (yes, Tbsp!)

1 cup

whole milk, at room temperature2