Lemon Lime Cupcakes Recipe

INGREDIENTS

2 1/4 cups

cake flour, like swan's down brand

1 tbsp

baking powder

1/2 tsp

kosher salt

1 1/4 cups

whole milk, room temperature

large egg whites, room temperature

lemon zest, from one medium lemon

lime zest, of one medium lime

1 1/2 cups

granulated sugar

1 stick

unsalted butter, (8 tablespoons), at room temperature

2 tsp

pure vanilla extract

3 sticks

unsalted butter, softened (1 1/2 cups)

1 1/2 lb

powdered sugar, sifted (24 ounces)

2 tsp

pure vanilla extract

lemon zest, from 1 medium lemon

lime zest, from 1 medium lime

1 tbsp

fresh lemon juice

1 tbsp

fresh lime juice

1 tbsp

milk, if necessary