Perfect Sugar Cookies

Ingredients 3 cups all-purpose flour, plus more for surface 1 teaspoon baking powder ½ teaspoon kosher salt 1 cup (2 sticks) butter, softened 1 cup granulated sugar 1 large egg 1 teaspoon pure vanilla extract 1 tablespoon milk For the Buttercream Frosting: 1 cup (2 sticks) butter, softened 5 cups powdered sugar ¼ cup heavy cream ½ teaspoon pure almond extract ¼ teaspoon kosher salt …