INGREDIENTS
5
egg whites, room temperature
3/4 cup
buttermilk
2
lemons, zested
3/4 cup
unsalted butter, softened
1 3/4 cups
granulated sugar
2 1/2 cups
cake flour
1 tbsp
baking powder
1/2 tsp
kosher salt
4 oz
unsalted butter
4 oz
cream cheese
2 cups
powdered sugar
1 cup
plus 2 Tbsp [lemon curd|https://www.shugarysweets.com/2013/02/easy-homemade-lemon-curd], divided
1/2 cup
all purpose flour
1/2 cup
powdered sugar
1/4 cup
unsalted butter, cold
1 tsp
vanilla extract