
1½ cups all-purpose flour
1 teaspoon baking powder
½ teaspoon salt
1 cup granulated sugar
½ cup salted butter, softened
2 large eggs, at room temperature
Zest from 1 lemon
½ teaspoon lemon extract
½ cup milk
½ cup water
½ cup sugar
6 basil leaves
2 teaspoons fresh lemon juice
1 to 1½ cups powdered sugar