INGREDIENTS
3
Eggs plus 1 egg yolk, large
3 tbsp
Lemon juice
1 tsp
Baking powder
1/2 tsp
Baking soda
2 1/2 cups
Cake flour
3 cups
Confectioners' sugar
1 3/4 cups
Granulated sugar
1/2 tsp
Salt
1 tsp
Vanilla extract
12 tbsp
Butter, unsalted
7/8 cup
Buttermilk
3 tablespoons grated zest and ¼ cup juice from 3 lemons