In an electric mixer with the paddle attachment, by hand with a wooden spoon, or with a handheld electric mixer, beat the butter ... Joanne Chang of Flour Bakery & Cafe writes in her "Pastry ...

Stir in the flour, baking powder, baking soda, and salt. Set aside.Put the butter in the bowl of a standing ... gradually add the granulated sugar and then the brown sugar, beating until very ...