Buttermilk Cakes with Meyer Lemon Icing

INGREDIENTS

1 cup

cake flour

1/2 cup

all-purpose flour

3/4 tsp

baking powder

3/4 tsp

baking soda

1/2 tsp

salt

1/2 cup

buttermilk

1 1/2 tsp

vanilla bean paste

1/2 cup

unsalted butter, room temperature

1 cup

sugar

large eggs, room temperature

large egg whites, room temperature

1 1/2 cups

confectioners’ sugar

1 cup

(61 - 81 g) freshly squeezed Meyer lemon juice