INGREDIENTS
1/2 lb
unsalted butter, at room temperature
2 1/2 cups
granulated sugar, divided
4
extra-large eggs, at room temperature
1/3 cup
grated lemon zest (6 to 8 large lemons)
3 cups
flour
1/2 tsp
baking powder
1/2 tsp
baking soda
1 tsp
kosher salt
3/4 cup
freshly squeezed lemon juice, divided
3/4 cup
buttermilk, at room temperature
1 tsp
pure vanilla extract
2 cups
confectioners' sugar, sifted
3 1/2 tbsp
freshly squeezed lemon juice